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=Laptop News 2007-06-30=
=Laptop News 2007-07-07=
1. Arahuay, Peru: Carla Gomez Monroy has been helping the ministry of education with a school trial at the Institución Educativa Apóstol Santiago, a combination primary and secondary school in a small town in the Cordillera de la Viuda, 2600 m. above sea level.
1. Washington: Walter Bender had to dust off his tuxedo in order to receive the Bridging Nations “Bridge Builder Award: Technological Innovation for Bridging Digital Divide” on behalf of OLPC.


2. Taipei: Mary Lou Jepsen gave a keynote at a display manufacturing conference in Taipei where she highlighted the fact that the XO display took only six months to go from specification to full certification, ready for high-volume mass production product. This rapid development is unheard of in the display industry where 10-to-20 years is more the norm for a new display—and thus the XO was the center of much discussion at the conference. Other large display manufacturers are expressing interest in helping with Gen2 development as well as providing a second source of the Gen1 display. Of course Mary Lou explained our loyalty and strong relationship with ChiMei. The reception was quite different from 18 months ago, when getting buy-in from the display manufacturers was one of the largest challenges for OLPC.
2. Porto Alegre: Juliano Bittencourt reports that UFRGS (Federal University of Rio Grande do Sul) held a small conference, INOVA, to share the best research from the university with the local community. As they did at the International Free Software Conference (FISL), researchers from the university brought a group of children to conference to share their experiences with the use of the XO. The children stole the spotlight: “it was very satisfying to see how they talked with people, how they became autonomous, and were very proud of their projects. They behave like small scientists, making interviews with their laptop using the camera, taking notes in the Write Activity, and posting reports to their blogs on AMADIS.”


3. OLPC was nominated and selected as a potential beneficiary of the American Express Card's Members Project (www.membersproject.com). Projects are voted for through several rounds and the winners are eligible for a grant of between $1–$5 million. OLPC is listed under project number 07229.
3. Green: Mary Lou Jepsen has completed all paper work for environmental compliance with EPEAT, the organization that implements the IEEE 1680-2006 computer environmental standard. OLPC’s EPEAT “Gold” status is now pending. Mary Lou has a draft version available of our ISO14001-compliant OLPC environmental policy, which is required for EPEAT compliance. In addition, OLPC has joined and filed for Energy Star 4.0 recognition; the XO exceeds the Energy Star compliance requirements by 14-fold.


4. XO testing: Quanta has put an enormous effort into testing the laptops in each of the five builds to date (A Test and B1–B4). The approximately 7000 prototypes have undergone temperature, electrical, mechanical, durability, and environmental testing:
4. Safety: OLPC, Quanta, and UL met this week to discuss progress on safety testing. Preliminary findings are excellent; further details of testing were discussed, including specific in-country requirements. The XO appears to be on track for UL certification; further testing of batteries and AC adaptors is planned. UL will help us apply for CE markings to allow us to ship in Europe.


Temperature: 55C/40% relative humidity (RH) operation test, 32C/50% RH operation test, 30C/85% RH operation test, –0C operation test, 85C storage test, –40C storage test, thermal shock and profile test (60C to –20C);
5. Trial-2: Tuesday marked the feature-freeze date for the Trial-2 software release. We have begun testing of the software release (See [[Test issues]]); there are test plans for activities, connectivity, performance, mesh view, suspend/resume, and updates. Thanks to Zack Cerza, John Fuhrer, Cameron Meadors, and Ronak Chockshi, who have contributed to these plans.


Electrical: AC power, BIOS flashing, Open Firmware, power management, USB 2.0, NAND flash, Wireless LAN, camera, memory, battery, LED indicator, stress test, ESD, battery discharge, LCD module verification, line-voltage and frequency test, power-on/off test, altitude test, wave-form measurement, frequency response, speaker performance, touch-pad performance, S0 state, S3 states, driver level, frequency accuracy, oscillation allowance, negative resistance, load capacitance, DDR1, critical trace, power-rail ramp, voltage level and noise, USB 1.1, Radiation of EN 55022, EN 61000-4-4, skin/case temperature, etc.;
6. Network: The Collabora team continued work on the peer-to-peer networking pieces that will allow Sugar Activity authors to readily share data between their activities; the focus has been on “tubes” and multicast support for the mesh. Dan Williams helped debug direct XO-to-XO communications and plowed through more network manager (NM) issues. Dan, along with Kim Quirk, John Watlington, Scott Ananian, and Michail Bletsas continue to refine NM as we realize more functionality and stability in our network drivers and get more feedback from internal testing and the field.


Mechanical environmental test: operating and non-operating vibration test, operating and non-operating shock test, package drop test, package storage test, tilt drop test, free drop test, LCD stress test, base pressure test, LCD-pressure vibration test, switch-protection test, LCD-twist test, connector-tension test, adapter-cable bending test, spill test, water test;
Michail tested the latest wireless firmware from Marvell (5.110.16.p0). It solves the issues with lazy-WDS access points (like the extremely popular Linksys WRT54G). This is the issue where XOs associated with a WiFi access point will stop passing traffic intermittently for which we had a temporary (ugly) workaround in place. The current firmware, besides having the latest suspend/resume code bits, uses a new mesh frame format that is closer to the latest proposals circulating in the 802.11s standard committee. Unfortunately, the new format is incompatible with the older format; we will incorporate the new firmware in the XO builds and server software ASAP to minimize confusion.


Durability test: hinge 65K cycles, battery 10K cycles, buttons 1M cycles, power button 700K cycles, touch-pad buttons 3M cycles, USB ports 10K cycles, DC in 20K cycles, DC-in, line-out, and mic-in 10K cycles, wireless-antenna 5K cycles, SD card 16K cycles;
7. User interface: Marco Gritti hooked up Sugar and the core Activities into the Fedora translations system and has already integrated a community-contributed Arabic translation.


Special environmental test: sand and dust test, salt-fog test, solar- radiation test, rain test;
Marco and Benjamin Berg continue to refine the GTK (GIMP Toolkit) themes in conjunction with the design work being done by Eben Eliason and the Pentagram team. They also revisited the Journal core feature set that will be part of the first release software. Tomeu Vizoso continued his work on the web browser. He implemented an “object-chooser dialog” that is used in place of the standard file picker for the browser; items can now be uploaded from the Journal to the web. Tomeu also add the ability to shut down the XO from the home view (the power button will be used for suspend). In the Journal, he also implemented the latest toolbar design, added the ability to erase items, copy items onto the clipboard, and support for removable storage devices (e.g., USB sticks).


Abusive test: free-throw test, USB and SD card reverse test, tumbling test, water-sprinkle test, hinge max-angle test, tablet-mode max-angle test, antenna max-force test.
Dan, Marco, and John Palmieri also did packaging work in support of the Fedore Core 7 update. Dan also worked on some unresolved X video (Xv) bugs.


These are torture tests. Most of these tests are harder—by far—than that required for conventional laptops Currently, XO has passed the vast majority of tests. Provisions to pass the tough ESD, salt-fog, power-on/off test, and operating shock test are under way; as are even higher free-drop tests, more stringent hinge-torque tests; as well as stronger set of testing underway at UL as we enter C-Test phase in August.
8. Power management: Richard Hughes worked on the XO’s power management interfaces. He reports that our hardware abstraction layer detects and exports proper power supply interfaces, which means Activities have an easy way of querying the battery and the AC adapter. His patches should land soon. Richard also worked on D-Bus system activation; important in order to start system services through a standardized interface. He has a policy manager (OHM) running on the laptop that will do things such as dim the backlight when the machine is idle and turn off the panel when the lid on the XO is shut.


5. Mechanicals: Bret Recor of Fuse Project was in Shanghai this week to work closely with Frank Lee of Quanta on finalizing the texturing for plastic-housing parts. Bean texture will appear on the exterior white housing and a matte—“satin”—texture on the interior and the green parts.
9. Software updates: Scott Ananian, Ivan Krstić, Chris Blizzard, David Woodhouse, and Alex Larsson engaged in a (somewhat heated) discussion of the XO upgrade model; a concrete specification will be the outcome.


6. Trial-2 software: At the beginning of the week we added the latest Marvell firmware to both the XO and the school server software images to get past “flag day” in Cambridge: builds before Build 486 (or Build 406.16) will not work with these later builds. Henceforth, as we send products out to the field, we need to know if the recipient already has XOs; any older machines will need to be upgraded so the new ones and old ones will work together. (The test group continues to keep a log of Release Notes for each build, which can be accessed at [[Test Group Release Notes]].
Meanwhile Alex spent the week working on the “Updatinator” code. His utilities that can generate manifests, generating differences between manifests, verify a directory tree against a manifest, and upgrade a directory tree from one manifest to another. He also has a tool that can generate a manifest from a set of images. His code, written in Python, knows how to download blobs and manifests from a http server, using a well-defined format and uses Avahi to automatically find local machines that have newer versions of a manifest. He also put together a small web server that an XO can run in order to export an image such that other laptops can upgrade from it.


7. Hardware management: Richard Hughes continued his work on our hardware policy manager. He is in the final stages of getting it into our builds by running it through the Fedora review process. Matthias Clasen has been helping him run through the process and has been pointing out improvements to be made. He also integrated open hardware manager (OHM) with the new X IDLETIME alarm interface. He also added support for the battery and AC adapter to the hardware abstraction layer (HAL) so that it is more easily exported to programs. Using this interface, Marco Gritti has added support to Sugar to extract the battery information from HAL.
Chris Ball has written a script that performs a backup of user data during upgrades; we can start using it next week. Scott benchmarked XO upgrades between Builds 464, 465, and 466 using rsync, “improved” rsync, and “improved” bittorrent. (He wrote code to use per-directory manifests to improve rsync and added the ability to bittorrent filesystem images, complete with user/group/mode and special file information.) He also started implementing a skeleton XO upgrade system that we can use to automate our 100+ laptop mesh-network tests in the coming weeks.


8. Mesh collaboration: The Collabora team had a busy week working on bug-fixes in the dbus-python bindings, debugging interactions between telepathy and the other modules, working through details of the tubes API, fixing issues with the peer-to-peer extensible messaging and presence protocol (XMPP), working on the multicast protocol for the mesh, finshing up the “hellomesh” activity, and fixing the chat activity.
10. Microphone: Chris Ball reports that the audio driver now keeps the microphone-in-use LED off while the audio hardware is not being used. There is still a bug remaining: the LED turns on during both recording and playback (because the default state of the driver is to have the V_Ref microphone bias turned on).


9. Building builds: John Palmieri continued pushing builds out the door. He has been splitting his time between trying to get Trail-2 work done and also working on a stable 406 build (the latter build includes power management and other low-level features, but not the new collaboration and Journal features). He also worked on getting QEMU (an open source machine emulator and virtualizer) and VirtualBox (a commercial virtualizer) working with our images again.
11. Fun and games: Lincoln Quirk has been working on infrastructure stuff and the pygame wrapper. He has been experimenting with various techniques for integration of GTK and pygame; he also did some preliminary work with Eric Nelson to use the camera as a game input device. It still in process, but the wrapper supports the game keys properly. Lincoln also done a lot of documentation work in the OLPC wiki.


The basic Vmware image conversion process outlined at in the OLPC wiki (See [[Emulating th XO/UsingVMware]]) is also working. Scott Devine has been working on VMware mesh-network emulation and the XO images are now part of Vmware’s daily regression testing.
Roberto Faga has been working on an adventure game toolkit; he has been tackling the challenging problem of creating a simple generic parser that can cope with different noun/verb/object word orders in different languages. At the same time, he's trying to construct a user interface (UI) that would allow the creation of these games in a purely graphical model.


10. Sugar: Marco Gritti and Tomeu Vizoso continue to chase bugs in Sugar and the Journal as part of the Trail 2 work. Walter Bender and Eben Eliason revisited the XO color schemes; more vivid and legible color dyads will be available in the upcoming builds. Dan Williams worked on Network Manager, fixed an avahi bug, fought through numerous packaging issues as part of the Fedora Core 7 move, and also worked on some gstreamer issues around camera support.
Patrick DeJarnette's side-scrolling game engine got a lot faster this week, and now has semi-intelligent moving “enemies.” It should be a lot of fun for the children to design their own game levels.


11. Updates: Scott Ananian wrote a recursive binary diff tool based on bsdiff/bspatch in order to investigate the lower limits of upgrade sizes. Comparisons with rsync and the Dan Williams patched version of “updatinator” showed that our various upgrade strategies are now not too far from optimal.
12. Analog input: Arjun Sarwal has created a basic UI for turning the XO into an oscilloscope. He has built controls for AC/DC, bias, RMS AVG, and Pk-Pk values. He is working with John Watlington to characterize the frequency characteristics of the AD1888 and they are working towards enabling the double sample rate that this chip supports. They are also studying the filter in the power supply, with the goal to reduce the noise floor. Another target is to bring down to 0V the minimum voltage that the analog input port can sample (the current minimum is 0.4V).

12. X Window System: Bernie Innocenti spent much of the week working on bug #1837, the “fancy color on text” bug, which turned out to be pretty tough. The more he dug into it, the more he keep getting evidence pointing in opposite directions. We see similar text corruption on OLPC, F8 and Ubuntu Gutsy on the Geode LX (both 16bpp and 32bpp) and Radeon R200 (but only in 16bpp) in both with EXA and XAA. Disabling acceleration cures it. The plot thickens.

Another serious bug that had been making the X server on the GX (B2 and B1) unusable in the development builds was found through work of Jordan Crouse and Adam Jackson late Friday afternoon.

13. Kernel: Andres Salomon worked on getting code upstream this week. The Geode support in master is mostly in Andrew Morton's tree; some is trickling into Linus's tree as well. Andres also did the standard merge dance (nothing exciting there, though we should be approaching a final 2.6.22 soon). Marcelo Tosatti spent time merging his USB changes to master.

Marcelo and Chris Ball looked into some suspend/resume failures. We can reliably suspend and resume wireless so long as the wireless module remains connected to the USB; Marcelo and Cozybit continue to investigate issues suspending and resuming with the wireless disconnected entirely.

The “pop” that we receive from the amplifier is barely audible on the B4 machines, but we will continue to investigate it—if the pop is caused by a hardware bug, now is the time to fix it.

The microphone LED was turning on regardless of whether we were using the audio device for playback or recording. Chris came up with logic to keep it turned off when we aren't recording, implemented it, and will send his patch to Jaya Kumar for review.

Scott imported glibc into git and (after some fighting) got it to build, so he is setup to write the glibc RDNSS-over-RA patches.

14. School server: Mitch Bradley got a preliminary version of PowerPC Open Firmware running on the school-server development machine. Mitch also released the core PowerPC Open Firmware code to openbios.org under an MIT license.

Dan Margo completed the scripts that will let us build OLPC-specific RPM configuration packages. These packages follow a fairly complex install-and-update policy that: (A) organizes OLPC-specific configurations into a central directory, etc.olpc; and (B) respects user's configuration changes, while clobbering RPM defaults. These scripts are in want of more debugging on large, serious use cases, but are concept-complete.

Next week we plan to start building Fedora Core 7 livecd build scripts from a clean slate (and merge the work Holger has done based on Fedora 6) Once that is straightened out, we can start determining and then exporting the XS-specific configurations.

Scott also fought the QEMU/KVM (kernel-based virtual machine) fight and got XO and (sort of) XSX images built and working under emulation. The ground is laid for Dan and Scott to create XSX builds based on Fedora Core 7 images next week using Dan's rpm-configuration code.

15. Security: Mitch and Ivan Krstić hashed out firmware security issues around activation, firmware updates, and developer keys. Ivan, Mitch, and Scott defined three code-paths: (1) the chain from booting a signed kernel though invoking activation or pivoting to one of two base file-systems (upgrade or backup); (2) the anti-theft server, anti-theft client, and “invoke-upgrade-now” interactions; and (3) the fetch-upgrade hand-off to the security kernel, which validates the upgrade and tweaks some bits to signal the boot code (closing the circle). Implementation has begun: Ivan has built a skeleton antitheft server and client, and Scott has an initrd that takes control immediately after open firmware boots our (signed) kernel.

16. Embedded controller: Mitch helped Joel Stanley (Richard Smith's Summer of Code intern) get started on embedded controller (EC) development and in the process discovered a fix for the flakiness of the EC recovery process.

To help with the ongoing debugging efforts of Trac Bug #1752 Richard created a test version of the EC code that asserts the WLAN wakeup pin before issuing the SCI to the host. This allows the WLAN to have its USB bus up and running prior to the host. Experiments with WLAN firmware that does not detach from the USB bus works with suspend/resume. The EC test firmware was a possible workaround but Chris found that it still had issues.

David Woodhouse and Richard worked on making the PCB temp sensor work and verify that the resistor divider is set correctly. However, they found that the EC code is not working correctly. The voltage A/D readings do not appear to be updating. With a bit of Forth code under OFW to read the A/D directly and then they looked at the range of the sensor. The hardware is OK and there is enough resolution for our purposes

17. Content jams: The Commonwealth of Learning (COL) is working actively on open content for educators and students, especially those in regions newly introduced to computers. They are interested in starting a Summer of Content project along with OLPC, supporting existing open content efforts and focusing on short-term goals that will lead to literacy and more content creation. They are starting work on a Spanish Wikieducator, and planning content-creation workshops in each of the 53 Commonwealth states. Mel Chua met with Wayne Mackintosh of COL and worked out some initial details. Summer of Content would provide visibility to open content projects that need help and a unified way for interested students and young teachers to intern for these projects, focusing on potential interns in the Southern Hemisphere and running two summers a year, starting at the end of this calendar year.

18. Our Stories: UNICEF has presented “Our Stories” to their country offices in Uruguay, Brasil, Argentina, Nigeria, Rwanda, and Ethiopia, and are starting to collect stories that can be published and shared from their existing youth networks. Google's OurStories team now includes two engineering leads and website and interface leads.

19. Educational activity guidelines: Lauren Klien has been working on templates for learning activities and guidelines for people writing them (See [[Educational activity guidelines]], [[Sample learning activities]], and [[Learning activities]]). If you are working on activities of your own, please post them to the wiki and add/suggest guidelines of your own that you have found useful.

20. Distributed content: Thibaut Lamadon is working on the next iteration of his MeshBoard activity—a community bulletin board that runs serverlessly on the mesh network. Thibaut is testing out a new implementation that uses Tubes APIs.

21. Wiki: A weekly review of the OLPC wiki changes (now ~1000 a week) began last week. Xavier Alvarez’s latest round of categorization and organization of the wiki includes a proposal for a standard set of information boxes covering licensing and subject matter and audience, where to get more information, and what features or WikiProjects something is associated with. Comments and suggestions welcome (See [[OBX proposals]]).

MaMaMedia has started to move content into the OLPC wiki (See [[World Wide Workshop Foundation]]).

22. Reading: David Teller reports that the Lector book-reading project, which is javascript-based and runs inside the browser without its own UI, has a new version. They are just now in touch with Ian Bicking and Stephen Thorne about integrating their work on an in-browser interface for XO. Ian has a simple booksplitter working to split large files into small readable chunks. Josh Gay is working on a proper annotation spec to send around for how a generalized stet implementation will work; for the coming week.

23. Games: Julius Lucks and team continued to tweak their number munchers game, making sure it was properly localized and can share tilesets with the Memonumbers game (See [[Kuku]]).


=More News=
=More News=

Revision as of 21:46, 7 July 2007

  This page is monitored by the OLPC team.
   HowTo [ID# 48437]  +/-  

Laptop News 2007-07-07

1. Arahuay, Peru: Carla Gomez Monroy has been helping the ministry of education with a school trial at the Institución Educativa Apóstol Santiago, a combination primary and secondary school in a small town in the Cordillera de la Viuda, 2600 m. above sea level.

2. Taipei: Mary Lou Jepsen gave a keynote at a display manufacturing conference in Taipei where she highlighted the fact that the XO display took only six months to go from specification to full certification, ready for high-volume mass production product. This rapid development is unheard of in the display industry where 10-to-20 years is more the norm for a new display—and thus the XO was the center of much discussion at the conference. Other large display manufacturers are expressing interest in helping with Gen2 development as well as providing a second source of the Gen1 display. Of course Mary Lou explained our loyalty and strong relationship with ChiMei. The reception was quite different from 18 months ago, when getting buy-in from the display manufacturers was one of the largest challenges for OLPC.

3. OLPC was nominated and selected as a potential beneficiary of the American Express Card's Members Project (www.membersproject.com). Projects are voted for through several rounds and the winners are eligible for a grant of between $1–$5 million. OLPC is listed under project number 07229.

4. XO testing: Quanta has put an enormous effort into testing the laptops in each of the five builds to date (A Test and B1–B4). The approximately 7000 prototypes have undergone temperature, electrical, mechanical, durability, and environmental testing:

Temperature: 55C/40% relative humidity (RH) operation test, 32C/50% RH operation test, 30C/85% RH operation test, –0C operation test, 85C storage test, –40C storage test, thermal shock and profile test (60C to –20C);

Electrical: AC power, BIOS flashing, Open Firmware, power management, USB 2.0, NAND flash, Wireless LAN, camera, memory, battery, LED indicator, stress test, ESD, battery discharge, LCD module verification, line-voltage and frequency test, power-on/off test, altitude test, wave-form measurement, frequency response, speaker performance, touch-pad performance, S0 state, S3 states, driver level, frequency accuracy, oscillation allowance, negative resistance, load capacitance, DDR1, critical trace, power-rail ramp, voltage level and noise, USB 1.1, Radiation of EN 55022, EN 61000-4-4, skin/case temperature, etc.;

Mechanical environmental test: operating and non-operating vibration test, operating and non-operating shock test, package drop test, package storage test, tilt drop test, free drop test, LCD stress test, base pressure test, LCD-pressure vibration test, switch-protection test, LCD-twist test, connector-tension test, adapter-cable bending test, spill test, water test;

Durability test: hinge 65K cycles, battery 10K cycles, buttons 1M cycles, power button 700K cycles, touch-pad buttons 3M cycles, USB ports 10K cycles, DC in 20K cycles, DC-in, line-out, and mic-in 10K cycles, wireless-antenna 5K cycles, SD card 16K cycles;

Special environmental test: sand and dust test, salt-fog test, solar- radiation test, rain test;

Abusive test: free-throw test, USB and SD card reverse test, tumbling test, water-sprinkle test, hinge max-angle test, tablet-mode max-angle test, antenna max-force test.

These are torture tests. Most of these tests are harder—by far—than that required for conventional laptops Currently, XO has passed the vast majority of tests. Provisions to pass the tough ESD, salt-fog, power-on/off test, and operating shock test are under way; as are even higher free-drop tests, more stringent hinge-torque tests; as well as stronger set of testing underway at UL as we enter C-Test phase in August.

5. Mechanicals: Bret Recor of Fuse Project was in Shanghai this week to work closely with Frank Lee of Quanta on finalizing the texturing for plastic-housing parts. Bean texture will appear on the exterior white housing and a matte—“satin”—texture on the interior and the green parts.

6. Trial-2 software: At the beginning of the week we added the latest Marvell firmware to both the XO and the school server software images to get past “flag day” in Cambridge: builds before Build 486 (or Build 406.16) will not work with these later builds. Henceforth, as we send products out to the field, we need to know if the recipient already has XOs; any older machines will need to be upgraded so the new ones and old ones will work together. (The test group continues to keep a log of Release Notes for each build, which can be accessed at Test Group Release Notes.

7. Hardware management: Richard Hughes continued his work on our hardware policy manager. He is in the final stages of getting it into our builds by running it through the Fedora review process. Matthias Clasen has been helping him run through the process and has been pointing out improvements to be made. He also integrated open hardware manager (OHM) with the new X IDLETIME alarm interface. He also added support for the battery and AC adapter to the hardware abstraction layer (HAL) so that it is more easily exported to programs. Using this interface, Marco Gritti has added support to Sugar to extract the battery information from HAL.

8. Mesh collaboration: The Collabora team had a busy week working on bug-fixes in the dbus-python bindings, debugging interactions between telepathy and the other modules, working through details of the tubes API, fixing issues with the peer-to-peer extensible messaging and presence protocol (XMPP), working on the multicast protocol for the mesh, finshing up the “hellomesh” activity, and fixing the chat activity.

9. Building builds: John Palmieri continued pushing builds out the door. He has been splitting his time between trying to get Trail-2 work done and also working on a stable 406 build (the latter build includes power management and other low-level features, but not the new collaboration and Journal features). He also worked on getting QEMU (an open source machine emulator and virtualizer) and VirtualBox (a commercial virtualizer) working with our images again.

The basic Vmware image conversion process outlined at in the OLPC wiki (See Emulating th XO/UsingVMware) is also working. Scott Devine has been working on VMware mesh-network emulation and the XO images are now part of Vmware’s daily regression testing.

10. Sugar: Marco Gritti and Tomeu Vizoso continue to chase bugs in Sugar and the Journal as part of the Trail 2 work. Walter Bender and Eben Eliason revisited the XO color schemes; more vivid and legible color dyads will be available in the upcoming builds. Dan Williams worked on Network Manager, fixed an avahi bug, fought through numerous packaging issues as part of the Fedora Core 7 move, and also worked on some gstreamer issues around camera support.

11. Updates: Scott Ananian wrote a recursive binary diff tool based on bsdiff/bspatch in order to investigate the lower limits of upgrade sizes. Comparisons with rsync and the Dan Williams patched version of “updatinator” showed that our various upgrade strategies are now not too far from optimal.

12. X Window System: Bernie Innocenti spent much of the week working on bug #1837, the “fancy color on text” bug, which turned out to be pretty tough. The more he dug into it, the more he keep getting evidence pointing in opposite directions. We see similar text corruption on OLPC, F8 and Ubuntu Gutsy on the Geode LX (both 16bpp and 32bpp) and Radeon R200 (but only in 16bpp) in both with EXA and XAA. Disabling acceleration cures it. The plot thickens.

Another serious bug that had been making the X server on the GX (B2 and B1) unusable in the development builds was found through work of Jordan Crouse and Adam Jackson late Friday afternoon.

13. Kernel: Andres Salomon worked on getting code upstream this week. The Geode support in master is mostly in Andrew Morton's tree; some is trickling into Linus's tree as well. Andres also did the standard merge dance (nothing exciting there, though we should be approaching a final 2.6.22 soon). Marcelo Tosatti spent time merging his USB changes to master.

Marcelo and Chris Ball looked into some suspend/resume failures. We can reliably suspend and resume wireless so long as the wireless module remains connected to the USB; Marcelo and Cozybit continue to investigate issues suspending and resuming with the wireless disconnected entirely.

The “pop” that we receive from the amplifier is barely audible on the B4 machines, but we will continue to investigate it—if the pop is caused by a hardware bug, now is the time to fix it.

The microphone LED was turning on regardless of whether we were using the audio device for playback or recording. Chris came up with logic to keep it turned off when we aren't recording, implemented it, and will send his patch to Jaya Kumar for review.

Scott imported glibc into git and (after some fighting) got it to build, so he is setup to write the glibc RDNSS-over-RA patches.

14. School server: Mitch Bradley got a preliminary version of PowerPC Open Firmware running on the school-server development machine. Mitch also released the core PowerPC Open Firmware code to openbios.org under an MIT license.

Dan Margo completed the scripts that will let us build OLPC-specific RPM configuration packages. These packages follow a fairly complex install-and-update policy that: (A) organizes OLPC-specific configurations into a central directory, etc.olpc; and (B) respects user's configuration changes, while clobbering RPM defaults. These scripts are in want of more debugging on large, serious use cases, but are concept-complete.

Next week we plan to start building Fedora Core 7 livecd build scripts from a clean slate (and merge the work Holger has done based on Fedora 6) Once that is straightened out, we can start determining and then exporting the XS-specific configurations.

Scott also fought the QEMU/KVM (kernel-based virtual machine) fight and got XO and (sort of) XSX images built and working under emulation. The ground is laid for Dan and Scott to create XSX builds based on Fedora Core 7 images next week using Dan's rpm-configuration code.

15. Security: Mitch and Ivan Krstić hashed out firmware security issues around activation, firmware updates, and developer keys. Ivan, Mitch, and Scott defined three code-paths: (1) the chain from booting a signed kernel though invoking activation or pivoting to one of two base file-systems (upgrade or backup); (2) the anti-theft server, anti-theft client, and “invoke-upgrade-now” interactions; and (3) the fetch-upgrade hand-off to the security kernel, which validates the upgrade and tweaks some bits to signal the boot code (closing the circle). Implementation has begun: Ivan has built a skeleton antitheft server and client, and Scott has an initrd that takes control immediately after open firmware boots our (signed) kernel.

16. Embedded controller: Mitch helped Joel Stanley (Richard Smith's Summer of Code intern) get started on embedded controller (EC) development and in the process discovered a fix for the flakiness of the EC recovery process.

To help with the ongoing debugging efforts of Trac Bug #1752 Richard created a test version of the EC code that asserts the WLAN wakeup pin before issuing the SCI to the host. This allows the WLAN to have its USB bus up and running prior to the host. Experiments with WLAN firmware that does not detach from the USB bus works with suspend/resume. The EC test firmware was a possible workaround but Chris found that it still had issues.

David Woodhouse and Richard worked on making the PCB temp sensor work and verify that the resistor divider is set correctly. However, they found that the EC code is not working correctly. The voltage A/D readings do not appear to be updating. With a bit of Forth code under OFW to read the A/D directly and then they looked at the range of the sensor. The hardware is OK and there is enough resolution for our purposes

17. Content jams: The Commonwealth of Learning (COL) is working actively on open content for educators and students, especially those in regions newly introduced to computers. They are interested in starting a Summer of Content project along with OLPC, supporting existing open content efforts and focusing on short-term goals that will lead to literacy and more content creation. They are starting work on a Spanish Wikieducator, and planning content-creation workshops in each of the 53 Commonwealth states. Mel Chua met with Wayne Mackintosh of COL and worked out some initial details. Summer of Content would provide visibility to open content projects that need help and a unified way for interested students and young teachers to intern for these projects, focusing on potential interns in the Southern Hemisphere and running two summers a year, starting at the end of this calendar year.

18. Our Stories: UNICEF has presented “Our Stories” to their country offices in Uruguay, Brasil, Argentina, Nigeria, Rwanda, and Ethiopia, and are starting to collect stories that can be published and shared from their existing youth networks. Google's OurStories team now includes two engineering leads and website and interface leads.

19. Educational activity guidelines: Lauren Klien has been working on templates for learning activities and guidelines for people writing them (See Educational activity guidelines, Sample learning activities, and Learning activities). If you are working on activities of your own, please post them to the wiki and add/suggest guidelines of your own that you have found useful.

20. Distributed content: Thibaut Lamadon is working on the next iteration of his MeshBoard activity—a community bulletin board that runs serverlessly on the mesh network. Thibaut is testing out a new implementation that uses Tubes APIs.

21. Wiki: A weekly review of the OLPC wiki changes (now ~1000 a week) began last week. Xavier Alvarez’s latest round of categorization and organization of the wiki includes a proposal for a standard set of information boxes covering licensing and subject matter and audience, where to get more information, and what features or WikiProjects something is associated with. Comments and suggestions welcome (See OBX proposals).

MaMaMedia has started to move content into the OLPC wiki (See World Wide Workshop Foundation).

22. Reading: David Teller reports that the Lector book-reading project, which is javascript-based and runs inside the browser without its own UI, has a new version. They are just now in touch with Ian Bicking and Stephen Thorne about integrating their work on an in-browser interface for XO. Ian has a simple booksplitter working to split large files into small readable chunks. Josh Gay is working on a proper annotation spec to send around for how a generalized stet implementation will work; for the coming week.

23. Games: Julius Lucks and team continued to tweak their number munchers game, making sure it was properly localized and can share tilesets with the Memonumbers game (See Kuku).

More News

Laptop News is archived at Laptop News. Also on community-news.

You can subscribe to the OLPC community-news mailing list by visiting the laptop.org mailman site.

Press requests: please send email to press@racepointgroup.com

Milestones

Latest milestones:

Nov. 2007 Mass Production has started.
July. 2007 One Laptop per Child Announces Final Beta Version of its Revolutionary XO Laptop.
Apr. 2007 First pre-B3 machines built.
Mar. 2007 First mesh network deployment.
Feb. 2007 B2-test machines become available and are shipped to developers and the launch countries.
Jan. 2007 Rwanda announced its participation in the project.

All milestones can be found here.


Press

  This page is monitored by the OLPC team.
   HowTo [ID# 48437]  +/-  

Laptop News 2007-07-07

1. Arahuay, Peru: Carla Gomez Monroy has been helping the ministry of education with a school trial at the Institución Educativa Apóstol Santiago, a combination primary and secondary school in a small town in the Cordillera de la Viuda, 2600 m. above sea level.

2. Taipei: Mary Lou Jepsen gave a keynote at a display manufacturing conference in Taipei where she highlighted the fact that the XO display took only six months to go from specification to full certification, ready for high-volume mass production product. This rapid development is unheard of in the display industry where 10-to-20 years is more the norm for a new display—and thus the XO was the center of much discussion at the conference. Other large display manufacturers are expressing interest in helping with Gen2 development as well as providing a second source of the Gen1 display. Of course Mary Lou explained our loyalty and strong relationship with ChiMei. The reception was quite different from 18 months ago, when getting buy-in from the display manufacturers was one of the largest challenges for OLPC.

3. OLPC was nominated and selected as a potential beneficiary of the American Express Card's Members Project (www.membersproject.com). Projects are voted for through several rounds and the winners are eligible for a grant of between $1–$5 million. OLPC is listed under project number 07229.

4. XO testing: Quanta has put an enormous effort into testing the laptops in each of the five builds to date (A Test and B1–B4). The approximately 7000 prototypes have undergone temperature, electrical, mechanical, durability, and environmental testing:

Temperature: 55C/40% relative humidity (RH) operation test, 32C/50% RH operation test, 30C/85% RH operation test, –0C operation test, 85C storage test, –40C storage test, thermal shock and profile test (60C to –20C);

Electrical: AC power, BIOS flashing, Open Firmware, power management, USB 2.0, NAND flash, Wireless LAN, camera, memory, battery, LED indicator, stress test, ESD, battery discharge, LCD module verification, line-voltage and frequency test, power-on/off test, altitude test, wave-form measurement, frequency response, speaker performance, touch-pad performance, S0 state, S3 states, driver level, frequency accuracy, oscillation allowance, negative resistance, load capacitance, DDR1, critical trace, power-rail ramp, voltage level and noise, USB 1.1, Radiation of EN 55022, EN 61000-4-4, skin/case temperature, etc.;

Mechanical environmental test: operating and non-operating vibration test, operating and non-operating shock test, package drop test, package storage test, tilt drop test, free drop test, LCD stress test, base pressure test, LCD-pressure vibration test, switch-protection test, LCD-twist test, connector-tension test, adapter-cable bending test, spill test, water test;

Durability test: hinge 65K cycles, battery 10K cycles, buttons 1M cycles, power button 700K cycles, touch-pad buttons 3M cycles, USB ports 10K cycles, DC in 20K cycles, DC-in, line-out, and mic-in 10K cycles, wireless-antenna 5K cycles, SD card 16K cycles;

Special environmental test: sand and dust test, salt-fog test, solar- radiation test, rain test;

Abusive test: free-throw test, USB and SD card reverse test, tumbling test, water-sprinkle test, hinge max-angle test, tablet-mode max-angle test, antenna max-force test.

These are torture tests. Most of these tests are harder—by far—than that required for conventional laptops Currently, XO has passed the vast majority of tests. Provisions to pass the tough ESD, salt-fog, power-on/off test, and operating shock test are under way; as are even higher free-drop tests, more stringent hinge-torque tests; as well as stronger set of testing underway at UL as we enter C-Test phase in August.

5. Mechanicals: Bret Recor of Fuse Project was in Shanghai this week to work closely with Frank Lee of Quanta on finalizing the texturing for plastic-housing parts. Bean texture will appear on the exterior white housing and a matte—“satin”—texture on the interior and the green parts.

6. Trial-2 software: At the beginning of the week we added the latest Marvell firmware to both the XO and the school server software images to get past “flag day” in Cambridge: builds before Build 486 (or Build 406.16) will not work with these later builds. Henceforth, as we send products out to the field, we need to know if the recipient already has XOs; any older machines will need to be upgraded so the new ones and old ones will work together. (The test group continues to keep a log of Release Notes for each build, which can be accessed at Test Group Release Notes.

7. Hardware management: Richard Hughes continued his work on our hardware policy manager. He is in the final stages of getting it into our builds by running it through the Fedora review process. Matthias Clasen has been helping him run through the process and has been pointing out improvements to be made. He also integrated open hardware manager (OHM) with the new X IDLETIME alarm interface. He also added support for the battery and AC adapter to the hardware abstraction layer (HAL) so that it is more easily exported to programs. Using this interface, Marco Gritti has added support to Sugar to extract the battery information from HAL.

8. Mesh collaboration: The Collabora team had a busy week working on bug-fixes in the dbus-python bindings, debugging interactions between telepathy and the other modules, working through details of the tubes API, fixing issues with the peer-to-peer extensible messaging and presence protocol (XMPP), working on the multicast protocol for the mesh, finshing up the “hellomesh” activity, and fixing the chat activity.

9. Building builds: John Palmieri continued pushing builds out the door. He has been splitting his time between trying to get Trail-2 work done and also working on a stable 406 build (the latter build includes power management and other low-level features, but not the new collaboration and Journal features). He also worked on getting QEMU (an open source machine emulator and virtualizer) and VirtualBox (a commercial virtualizer) working with our images again.

The basic Vmware image conversion process outlined at in the OLPC wiki (See Emulating th XO/UsingVMware) is also working. Scott Devine has been working on VMware mesh-network emulation and the XO images are now part of Vmware’s daily regression testing.

10. Sugar: Marco Gritti and Tomeu Vizoso continue to chase bugs in Sugar and the Journal as part of the Trail 2 work. Walter Bender and Eben Eliason revisited the XO color schemes; more vivid and legible color dyads will be available in the upcoming builds. Dan Williams worked on Network Manager, fixed an avahi bug, fought through numerous packaging issues as part of the Fedora Core 7 move, and also worked on some gstreamer issues around camera support.

11. Updates: Scott Ananian wrote a recursive binary diff tool based on bsdiff/bspatch in order to investigate the lower limits of upgrade sizes. Comparisons with rsync and the Dan Williams patched version of “updatinator” showed that our various upgrade strategies are now not too far from optimal.

12. X Window System: Bernie Innocenti spent much of the week working on bug #1837, the “fancy color on text” bug, which turned out to be pretty tough. The more he dug into it, the more he keep getting evidence pointing in opposite directions. We see similar text corruption on OLPC, F8 and Ubuntu Gutsy on the Geode LX (both 16bpp and 32bpp) and Radeon R200 (but only in 16bpp) in both with EXA and XAA. Disabling acceleration cures it. The plot thickens.

Another serious bug that had been making the X server on the GX (B2 and B1) unusable in the development builds was found through work of Jordan Crouse and Adam Jackson late Friday afternoon.

13. Kernel: Andres Salomon worked on getting code upstream this week. The Geode support in master is mostly in Andrew Morton's tree; some is trickling into Linus's tree as well. Andres also did the standard merge dance (nothing exciting there, though we should be approaching a final 2.6.22 soon). Marcelo Tosatti spent time merging his USB changes to master.

Marcelo and Chris Ball looked into some suspend/resume failures. We can reliably suspend and resume wireless so long as the wireless module remains connected to the USB; Marcelo and Cozybit continue to investigate issues suspending and resuming with the wireless disconnected entirely.

The “pop” that we receive from the amplifier is barely audible on the B4 machines, but we will continue to investigate it—if the pop is caused by a hardware bug, now is the time to fix it.

The microphone LED was turning on regardless of whether we were using the audio device for playback or recording. Chris came up with logic to keep it turned off when we aren't recording, implemented it, and will send his patch to Jaya Kumar for review.

Scott imported glibc into git and (after some fighting) got it to build, so he is setup to write the glibc RDNSS-over-RA patches.

14. School server: Mitch Bradley got a preliminary version of PowerPC Open Firmware running on the school-server development machine. Mitch also released the core PowerPC Open Firmware code to openbios.org under an MIT license.

Dan Margo completed the scripts that will let us build OLPC-specific RPM configuration packages. These packages follow a fairly complex install-and-update policy that: (A) organizes OLPC-specific configurations into a central directory, etc.olpc; and (B) respects user's configuration changes, while clobbering RPM defaults. These scripts are in want of more debugging on large, serious use cases, but are concept-complete.

Next week we plan to start building Fedora Core 7 livecd build scripts from a clean slate (and merge the work Holger has done based on Fedora 6) Once that is straightened out, we can start determining and then exporting the XS-specific configurations.

Scott also fought the QEMU/KVM (kernel-based virtual machine) fight and got XO and (sort of) XSX images built and working under emulation. The ground is laid for Dan and Scott to create XSX builds based on Fedora Core 7 images next week using Dan's rpm-configuration code.

15. Security: Mitch and Ivan Krstić hashed out firmware security issues around activation, firmware updates, and developer keys. Ivan, Mitch, and Scott defined three code-paths: (1) the chain from booting a signed kernel though invoking activation or pivoting to one of two base file-systems (upgrade or backup); (2) the anti-theft server, anti-theft client, and “invoke-upgrade-now” interactions; and (3) the fetch-upgrade hand-off to the security kernel, which validates the upgrade and tweaks some bits to signal the boot code (closing the circle). Implementation has begun: Ivan has built a skeleton antitheft server and client, and Scott has an initrd that takes control immediately after open firmware boots our (signed) kernel.

16. Embedded controller: Mitch helped Joel Stanley (Richard Smith's Summer of Code intern) get started on embedded controller (EC) development and in the process discovered a fix for the flakiness of the EC recovery process.

To help with the ongoing debugging efforts of Trac Bug #1752 Richard created a test version of the EC code that asserts the WLAN wakeup pin before issuing the SCI to the host. This allows the WLAN to have its USB bus up and running prior to the host. Experiments with WLAN firmware that does not detach from the USB bus works with suspend/resume. The EC test firmware was a possible workaround but Chris found that it still had issues.

David Woodhouse and Richard worked on making the PCB temp sensor work and verify that the resistor divider is set correctly. However, they found that the EC code is not working correctly. The voltage A/D readings do not appear to be updating. With a bit of Forth code under OFW to read the A/D directly and then they looked at the range of the sensor. The hardware is OK and there is enough resolution for our purposes

17. Content jams: The Commonwealth of Learning (COL) is working actively on open content for educators and students, especially those in regions newly introduced to computers. They are interested in starting a Summer of Content project along with OLPC, supporting existing open content efforts and focusing on short-term goals that will lead to literacy and more content creation. They are starting work on a Spanish Wikieducator, and planning content-creation workshops in each of the 53 Commonwealth states. Mel Chua met with Wayne Mackintosh of COL and worked out some initial details. Summer of Content would provide visibility to open content projects that need help and a unified way for interested students and young teachers to intern for these projects, focusing on potential interns in the Southern Hemisphere and running two summers a year, starting at the end of this calendar year.

18. Our Stories: UNICEF has presented “Our Stories” to their country offices in Uruguay, Brasil, Argentina, Nigeria, Rwanda, and Ethiopia, and are starting to collect stories that can be published and shared from their existing youth networks. Google's OurStories team now includes two engineering leads and website and interface leads.

19. Educational activity guidelines: Lauren Klien has been working on templates for learning activities and guidelines for people writing them (See Educational activity guidelines, Sample learning activities, and Learning activities). If you are working on activities of your own, please post them to the wiki and add/suggest guidelines of your own that you have found useful.

20. Distributed content: Thibaut Lamadon is working on the next iteration of his MeshBoard activity—a community bulletin board that runs serverlessly on the mesh network. Thibaut is testing out a new implementation that uses Tubes APIs.

21. Wiki: A weekly review of the OLPC wiki changes (now ~1000 a week) began last week. Xavier Alvarez’s latest round of categorization and organization of the wiki includes a proposal for a standard set of information boxes covering licensing and subject matter and audience, where to get more information, and what features or WikiProjects something is associated with. Comments and suggestions welcome (See OBX proposals).

MaMaMedia has started to move content into the OLPC wiki (See World Wide Workshop Foundation).

22. Reading: David Teller reports that the Lector book-reading project, which is javascript-based and runs inside the browser without its own UI, has a new version. They are just now in touch with Ian Bicking and Stephen Thorne about integrating their work on an in-browser interface for XO. Ian has a simple booksplitter working to split large files into small readable chunks. Josh Gay is working on a proper annotation spec to send around for how a generalized stet implementation will work; for the coming week.

23. Games: Julius Lucks and team continued to tweak their number munchers game, making sure it was properly localized and can share tilesets with the Memonumbers game (See Kuku).

More News

Laptop News is archived at Laptop News. Also on community-news.

You can subscribe to the OLPC community-news mailing list by visiting the laptop.org mailman site.

Press requests: please send email to press@racepointgroup.com

Milestones

Latest milestones:

Nov. 2007 Mass Production has started.
July. 2007 One Laptop per Child Announces Final Beta Version of its Revolutionary XO Laptop.
Apr. 2007 First pre-B3 machines built.
Mar. 2007 First mesh network deployment.
Feb. 2007 B2-test machines become available and are shipped to developers and the launch countries.
Jan. 2007 Rwanda announced its participation in the project.

All milestones can be found here.


Press

Template loop detected: Press More articles can be found here.

Video

Miscellaneous videos of the laptop can be found here.

More articles can be found here.

Video

Miscellaneous videos of the laptop can be found here.

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