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What software will be used with the $100 laptop?

The one-laptop-per-child computer (OLPC) is delivered with some general purpose software: web browser; word processer; basic tools for personal expression; etc. There are also high-quality educational examples of OLPC use. A more complete list is found here.

OLPC is working with Red Hat on a Linux kernel for the machine, but we are opening up the design; it is inevitable that there will be several variants of Linux to choose from, as well as some version of Windows, and perhaps an OS X offering.

We made a decision to base the OLPC laptop on open-source software in order to provide countries (as well as the teachers and the children) with the freedom to decide for themselves what to place on the machines, and to share and localize examples of best practice generated domestically and taken from abroad.

Open-source software gives children the opportunity to “own” the machine in every sense. While we don't expect every child to become a programmer, we don't want any ceiling imposed on those children who choose to reach towards complexity. We are using open document formats for much the same reason: transparency is empowering. The children—and their teachers—will have the freedom to reshape, reinvent, and reapply their software, hardware, and content.

Preventing Porn/Adult Content?

At launch time will the laptop include any software for content controls (to prevent porn, etc). I realize that one's definition of "acceptable content" varies over regions, but isn't most content filtering software for the client Win-based?

This will, as far as I know, be left up to countries. Because the hardware and software OLPC will provide is as open as possible, there is no real way to implement such filtering on the laptops themselves; the kids could just change the software to get around such restrictions. --18.85.46.22 19:16, 17 February 2007 (EST)

Since most computers will be used with no Internet access whatsoever, this is a minor problem. In areas where there will be Internet access it will be provided by a school gateway. The filtering will either be implemented on the school gateway or at a central regional gateway.

Sorry, but lack of the Internet won't matter. OLPC is all about locally-produced content. This laptop has a camera. Having an Internet connection is only required for worldwide sales and distribution.

The laptops will have Internet access. Children will be both exploring and producing content. --Walter 11:40, 2 April 2007 (EDT)

This question has not yet been answered with sufficient care Please click here for a comment (on another talk page within this wiki) about the machines being used to create pornography. The OLPC team will be making a grave error if they expect developing world governments to address this issue without guidance.

My guess is that considering that the XOs will basically access the Internet through the mesh (connecting to the School server—acting as the gateway) a simple filter or proxy can be configured... it is (imho) a worthy preocupation, but must not be taken as the issue; most kids will not care about such things, and when they do, they'll manage to get their hands on it regardless of how adults feel about it... --Xavi 00:39, 23 March 2007 (EDT)

Are you talking about a particular already existing sort of image filter? Please elaborate. What sort of proxy? The reason that I am stressing this issue is because the reactionary element within a developing country will see this as "the" issue when it hits the press and they can keep these computers out of the hands of their children. Even if computer literate people can look past this sort of issue, large traditional populations are not likely to. Again, I'm not concerned about people looking at pornography. Every single internet cafe that I visited in 24 African countries last year had at least two young men looking at porn and nobody cared. I am concerned about the video camera being used to exploit poor young women and children. Whoever is putting this project together doesn't seem to know enough about the resourcefulness of the people who they will equip with these machines. Why isn't someone from the actual OLPC project bothering to respond. Have any of those guys actually lived in the marginal areas of the developing world? --[User:Onlinementor] 24 March 2007.

The School server can be used for content filtering; the extent to which it will be is based upon a country-by-country decision. In regard to the children being exploited in the creation of pornographic content, it is certainly a concern, one we are trying to address through a number of mechanism, some technological, but most of a societal nature. The camera and microphone are hardwired to LEDs and are protected against remote access (See BitFrost for details). The Journal logs all activities, including picture-taking. But neither of these measures is adequate if the family and community turn their backs on their children. We are striving to engage all community members in the program, which includes guidance about the exploitation of children. --Walter 11:40, 2 April 2007 (EDT)

Thanks for the feedback, Walter. Is there somewhere on this site where I could track the conversation about how to create a suitably vigilant societal mechanism to protect against the creation of exploitative content? It's a huge challenge and while it is particularly relevant to the OLPC initiative, it is an OLD, often-confronted, unbested challenge. To paint it as a question of family and communal back-turning is somewhat misleading, as it suggests that any shortcoming on behalf of the responsible community will be committed with purposeful disregard. It is much more likely that they will be ignorant of the situation, powerless to do anything about it or coerced into accepting it.

I'm sure you are familiar with the fact that it is not uncommon for teachers in the developing world (especially in Sub-Saharan Africa) to use their students sexually--indeed the notion of what constitutes "exploitation" is rather variable. If you cannot have a meaningful allegiance with educators, I don't know how you hope to engender this new breed of social responsibility. I don't mean to sound glib. I would just love to hear, in reassuring detail, what sort of local and regional expertise is being applied to the question.

On the other page, I suggested a possibility that is less trusting of the local community; but productive of jobs and, perhaps more reliable.

A possible suggestion: Whenever someone is uploading pictures or video (via the mesh) to the internet, it must be approved by human eyes. Those eyes should belong to women in another part of the world. For instance, Uruguayan women, approve every image and video that Nigerian computer users upload. Libyan women approve every image and video that Uruguyans upload etc. It will be harder to corrupt the filter if it exists further away, speaks another language and is built of women.

The countries where you are going to pilot this program are full of women who would happily take an image filtering job for $50/month or thereabouts (and that, in many cases, would be a generous salary). Invest an extra $60,000 in each country towards the power of external, female filtering and you might be able to save yourselves considerable embarassment. In the context of this project, $60,000 sounds like a very modest investment; but it could create scores of jobs in each country and help to protect young people from the world's thirsty perversion. --[[User:Onlinementor] 2:20, 9 April 2007 (EST)

The laptop is a tool, and can be used "for good or evil". Personally I think that censorship is evil and that kids should be free to see what humans look like without their clothes. The kids I've known who grew up that way didn't turn out badly. So please stop trying to push your own cultural prejudices onto every kid in the world. If you made colored pencils for kids, would you set up a system of censorship to make sure they didn't draw anything sexy?

I think it's not about Onlinementor's, yours, or my prejudices. What counts is what the parents of the children want, that we are trying to influence here. They have the right to decide, if pornography/violence is accepted in their community. They should be empowered to limit the influence of the internet on their children.

Society change is always a violent process. The faster the change, the more violent it is. The best chance for success of OLPC in a community will be, if it does not change too much.I think it it very important to fit the filtering to the local community and their values. Internet-Access is a Social Change Tool. If the social change it creates is not wanted, the programm will fail. Every community might need a different level of porn/violence/political filters, so the change doesn´t get too much. But developing the restriction mechanisms should be a high priority for OLPC. Parents/community/nation want to stay in control of the minds of their children. If you refuse to let them have some control of the new influence on their children, they might refuse the whole offer.

In the end OLPC has to listen to the parents of the children, and take on all their key concerns. There is no way of saying: "we from the big wide world know what´s best for your child!" -[User:Bones, 1st post] 14.09.2007

Usability and User Testing

There is very little public information about requirements gathering, usability and user testing. In other words, how do you know whether the OLPC (i) will meet your users' needs and (ii) is easy enough for them to use? Have the target user groups been characterized? What ongoing plans do you have for this? I`d Like test the OLPC in Argentina, Please contct with me to know how. Thanks.

As far as I know, there are two local groups in Argentina with test boards (don't know if anybody has the 2B1/XO prototypes though). They are Ututo and Tuquito. I know Ututo had some explicit arrangements to let other people use/test the boards. If anybody knows about other groups (or about any local XOs) please let me know (or post in the OLPC Argentina pages. --Xavi 07:23, 6 December 2006 (EST)

There is more to life and education than requirements gathering. Usability and testing are of course important, and on-going. Research is often just trial, error, and adjustment. If you want, you can participate by setting up an emulator and seeing how the software works now. The research is going on now, and you can participate. Exciting, don't you think? -Jeff 21:47, 9 March 2007 (EST)

What about usability testing for children? A recent article quoted the OLPC chairman as saying: "Granted, I'm not a child. I don't know if it's going to be intuitive to children." Was there research?

Wouldn't having a choice of operating systems mess with the idea of having mesh networking, educational software and external mass data storage?

We anticipate that the choice of operating systems will be made at either a very coarse level of granularity, e.g., regionally, or by individuals. In the former case, it would have to be done in concert with some sort of "school-server" strategy. In the latter case, presumably the child making the choice has a reason for it.

OS languages that OLPC will release

What are the languages that OLPC will be released with? What are the first Priority ones?

The first priority languages are the languages of countries where the ministry of education has signed an agreement to deploy OLPC laptops to their children. In some of these countries there is more than one official language such as Nigeria with Edo, Efik, Adamawa Fulfulde, Hausa, Idoma, Igbo, Central Kanuri, and Yoruba.

If there is a language that you would like to see higher priority then you need to convince the ministry of education in a country where it is the official language, to sign an agreement with OLPC.

Will the mesh networking be an effective replacement for Internet access?

We don't anticipate the mesh network will replace the Internet, but rather it will complement the Internet. The mesh is for local communication. An uplink at the school will be the gateway out. Providing local telecommunications is in and of itself of benefit to the children and their communities. There may be local regulatory issues that need to be addressed.

Will the display be able to rotate orientation?

The OLPC laptop runs the X Window System, which has resize and rotate extensions.

How much is reserved for Content?

The operating system and “mandatory applications” occupy 200MB. This provides 800MB for the user.

Is the OLPC laptop a PC?

Yes.

Is the OLPC laptop a PC in the sense of being an IBM-compatible PC rather than just a “personal computer”?

The OLPC is clearly NOT an IBM compatible (or MS-DOS compatible, for that matter) PC even though it does currently use an x86 CPU. The OLPC laptop has many features that take it beyond a basic PC. And the designers reserve the right to change to a non-x86 CPU in the future if it makes sense. As one of the team said recently, AMD will have to earn our business. The goal is not to make another IBM compatible but to make a portable personal computer that a child can use as a core tool for their elementary education.

No other PC has a screen that can switch to a low-power, high-res monochrome mode. No other PC has such a low-power, extended-range wifi with its own CPU that can keep sending while the main CPU sleeps. No other PC is intended to be, first and foremost, a tool for educating children.

Contribution towards Programming

Hello,

I am really interested in contributing towards the programming efforts in linux kernel and python. Please let me know how shall I proceed and start contributing towards it?

Suresh, Bangalore, India.

Suresh, check this page "Getting involved in OLPC" and this page"OLPC Python Environment" -Jeff

Science curriculum

I do not see any content related sections for the sciences (physics, chemistry, biology) and math. Can you please point me to that section or include this in your curriculum?

Every page has a search section in the column on the left. If you don't see something in the table of contents then use the search capabilities to find it. If you still can't find something which you think should be on the wiki, then start a new page and write an outline of what you think we should have. Others will fill in that outline for you. If you return in a week or two, you will have your answer. --Memracom 05:23, 13 January 2007 (EST)

RealPlayer in OPLC and applications download

We are developing some applications that can be used to education purpose and we have some doubts: - Is it possible to make applications download using the OLPC ? - Is it possible to run the RealPlayer in OLPC ? Thanks in advance Vivian (vivianlona@hotmail.com)

The OLPC is based on downloadable activities, not applications. It will not have any RealPlayer support so you will need to encode in an open-source format. Ogg/Vorbis is good for music while Ogg/Speex is better for pure voice recordings. Read the Activity bundles page to see how to program a downloadable activity in Python.

What format do you require? RealPlayer can play many different formats. Quicktime can be played with GStreamer through OpenQuicktime and Gnash is mostly SWF v7 compliant (this makes Flash an open-source format). Gnash can play Flash movies from local files. If you would like to see either GStreamer or Gnash included you could add them to Category:Feedback. Thin client explains about use of the OLPC as a web client or thin client. --Fasten 11:40, 31 January 2007 (EST)

See also: Flash Player

"Activities" is just OLPC jargon for application programs. Don't be put off by people "correcting" you on that.

Real has been working to produce an OLPC version of their Helix Player, which is a free software player. The big problem is codecs -- most of the ones in common use (e.g. MP3) are patented and require the payment of commercial royalties. If you want to produce multimedia for children and make them useful to kids with OLPCs, then you will need to take care to encode your multimedia into freely licensed formats (Ogg Vorbis for music; Ogg Speex for speech; Ogg Theora for video). These can, of course, also be played on proprietary systems like Macs and PCs, though to encourage the use of their own locked-down formats, neither Apple nor Microsoft ships these free codecs with their OS; your application will have to install them.

The Gnash flash player doesn't come with any codecs; it relies on GStreamer to decode any media embedded in the flash movie. OLPC can distribute gnash, since it's GPL software, but can't distribute the codecs needed to play "FLV" (Flash Video) files, because they are proprietary to Adobe.

Adaptation of Musical Editor for local music systems

Hello, While browsing through the software that will be put on the B2 release, I remarked the screenshot of the Musical Editor, and I saw that it was based on the western notes system (do, re, mi, fa, sol, la, si, do). These notes have more or less fixed frequencies ('la' has 440 Hz, and going from one note to another happens by stepping of halve tones where the frequencies need to be multiplicated or divided by 1.059, the twelfth root of 2).

The OLPC project is ment for children in third world countries, like for instance India and China and other countries, where different music systems are used. Therefore I propose to foresee these adaptations within the Musical Editor (after all, it can't be the intention of forcing children to abandon their own musical culture :-?).

In case OLPC people are interested, I am willing to do some investigation in order to figure out which are the mostly used music systems with corresponding frequencies in order to facilitate the work. I can be reached via my e-mail address under my OLPC subscription account 'scampsd'.

The OLPC includes csound software which can be adapted to work with any type of musical system. If you want to document these systems and any csound software that works with them, feel free to start a new page on this wiki. --Memracom 05:30, 13 January 2007 (EST)

Best regards and good luck with the project Dominique

Hey "scampsd" i couldnt work out how to contact you about this, I am interested in alternative scales, mail me, simon att simon chadwick dt net

---from another contributor---

yes - i can see nepal, peru, thailand and india on the pilot project map that will be using different scalings 'naturally' without the fixing of the western scale to their use of the software. from the wikipedia.org page on microtonal music: "By this definition, the following systems are not microtonal: a diatonic scale in any meantone tuning; much Indonesian gamelan music; and Thai, Burmese, and African music which use 7 approximately equally spaced tones in each (approximate) octave." - there should be a module in csound for microtonal music: the most sensible option would be to have a special settings page to configure a preset choice of tunings for different regions to fit with preferred choice of tuning for the region. to eliminate locally tuned music would be an ethical crime, and is a big risk with a music program dictating that users have a 'western scale' for their music. i would not like OLPC to be responsible for the destruction of some of the most musically interesting and unique styles of music simply because there was no option for local tunings in the easily available and (relatively) powerful sequencing capabilities of freely available computers. it looks like Csound’s value converters for microtonal programming are functions "ampdb" and "cpspch". documentation on csound available at www.csounds.com/chapter1/index.html

Photo use suggestion

Apologies if this is the wrong place; I couldn't find a better spot on the wiki to suggest this. I hope someone can route it for me.

As I understand it, the OLPC system takes a photo of the laptop's owner at an early stage, and uses that in various UI elements to identify the child (e.g. the "neighbourhood" view).

Suggestion: this photo should also be displayed during startup, so that a teacher can work out who owns a laptop left behind in the classroom immediately, instead of needing to wait for the entire boot sequence.

It should also be displayed when/if the laptop is locked out due to a failure to contact the authentication server inside 21 days, or because it's been explicitly disabled due to theft.) This would allow a stray laptop to be reunited with its owner far easier, and/or make it simple for the police to ascertain that the person holding the laptop is not the owner.

That may well be the case.--216.194.7.250 11:39, 24 March 2007 (EDT)

Mesh Network Emulation

I'd like to try running a mesh network with emulation software; using say several laptops and a server (they could all be on one physical machine). I can't figure out how to create a mesh network using the qemu image, and don't see any images for the server. Thanks.

(I am a graduate student in Computer Science and Education, and would like to contribute to this project; but need to evaluate a working environment first)

Could this Virtualized Sugar page be what you're looking for? --Xavi 08:26, 6 February 2007 (EST)

Thanks... maybe. I fired up two instances of olpc on moka5, on separate machines in the same LAN, but couldn't them in the neighborhood. What more tinkering is required?

Looks like it didn't work, uh? I would suggest then that you raise the issue in one of the mailing lists probably networking. If you find an answer (solution or reason on why not) please post it here, so that we may then add it somewhere. Thanks and good luck! --Xavi 00:45, 7 February 2007 (EST)

Try turning on Bridge network for the virtual machines. There is an option to select that on top of the window.

By default, it is NAT.

All of the Mesh software is running inside the Marvell chip set on the OLPC, in currently-proprietary software; there is little or no support in the free Linux kernel or the Sugar UI. (Just configuration interfaces, and a way to gateway to the broader Internet.) So without the hardware, you can't run the mesh -- just an ordinary network. But since the mesh emulates an ordinary network, it's not usually a big deal. As the OLPC's higher level collaboration software starts working (soon, I hear) it should work over both ordinary networks (e.g. WiFi with an access point; WiFi in ad-hoc mode; or a USB Ethernet adapter) and over the mesh. --gnu

Where can software developers get laptops with which to work?

The vast majority of early software developers can work on ordinary Linux laptops or desktops. The machine will run Linux, X, and Gnome. Write your applications to use minimal RAM and minimal file system space, and to not depend on having a color screen. A release of the Fedora software for the OLPC is available (See Installing Fedora Core. If you want to simulate small memory, you can boot linux with the "mem=256m" parameter.) Some developers who need laptops, e.g. to work on device drivers, will receive prototype boards from OLPC. Here are Notes_on_using_the_OLPC_developer_boards.

I just want to try the software

I've read about the software and the UI online. I want to try the software. I want something like a "liveCD" that I can stick in my computer to try it out and show other people. a) Is it possible? b) If possible, is it explained anywhere on this eiki? c) if yes, why is it so hard to find? A nice big link on the homepage might be nice.

Don't know if there's a LiveCD, but you can try an emulator. On the left there's a navigation bar with a section titled "about the laptops", and under it you'll find the emulation link that'll take there... That wasn't so hard, was it? Enjoy!--Xavi 07:05, 5 January 2007 (EST)

A little question

The user install other programs on the pc, like on a normal pc using linux? If not, there is a way to run programs on the OLPC? The programs that I am referring are other programs, developed by users, etc...

The OLPC has a pretty small footprint. The OLPC Redhat distribution is very small, and has few program. There is an OLPC Redhat Development distribution which has a few more Linux programs, but it's still small. Sugar is the GUI interface, and has special activity programs. Activities are inherently networkable and sharable. -Jeff 21:45, 6 March 2007 (EST)

The answer to your question is yes. You can install other programs on the OLPC, like on a normal PC running Linux. The window system (Sugar) currently makes that hard, though someone is working on fixing that.

LiveCD OS Images

I downloaded a few of the recent LiveCD image builds (231), but for some reason the system does not load up and run. Obviously in this case you need a PC that has a CD/DVD reader etc. I may not be burning the CD correctly although Grub seems to start ok. Is there any particular hardware needed that a typical PC does not have, or something that I am not doing properly? Anyone out there that has this working and can share some ideas would be great. Thanks in advance.

This question might be bettered answered on one of the Tech pages.

Could you put a link to the "Tech Page". I'm having the same problem, what do I type at the grub prompt?

About emulating the OLPC disk Image

I am not sure where to post this as it's a rather technical support like question. I am emulating the OLPC image (I am using olpc-182.zip) in a intel iMac using VMWare tools beta. The emulations runs well, but with a limited size (640 x 480) and I know the laptop goes way beyond this. I have read somewhere an email from the OLPC mailing list that this was a recurring issue and many of the blog posts with screenshots and reviews of the SUgar interface where getting it wrong because of this.

I wanted to investigate this further (and help correct those blog reviews) and posted this question to the VMWare foruns, but they believe it's a problem with the OS image.

Any insights on this?

thank you

Alexandre Van de Sande www.wanderingabout.com alexandrevandesande (at) the email provided by google

Please refer to the emulation section of this wiki, specifically OS images for emulation and User Feedback on Images. --Walter 08:43, 8 January 2007 (EST)

autoreinstalation image through usb is not working..help..

i have successfully update image from this site...(olpc/manuals%20notes/Auto re installation_image.htm)...but after giving response ok at the end of setup...machine didn't reboot or shutdown... after waiting long time i shutdown the machine and then turn on .. then message comes : trying startup script disk:\boot\olpc-boot.fth..........and then no response for 5 minutes...after 5 minutes again a 4 lines message comes....

boot-file = ro root=mtd0 rootfstype=jffs2 console=ttys0, console =tty0 fbcon=font:sun12*22 pci=nobios video=gxfb:1024*768-16 boot-device = nand ..... and machine held with this message....and no response ....

can any body help me in this issue ?? -- Salman Minhas System Administrator Electronic Government Directorate

We have seen a few cases of auto-installer failures apparently due to "botched" downloads onto USB disks. We plan to mitigate that by including a manifest in the installer image, with checksums/hashes. In the interim, please try downloadinga new build image. --Walter 20:21, 17 February 2007 (EST)

Proxy configuration

Is there any way to configure a proxy in the OLPC Firefox?

The web activity is just a version of firefox. As such, you can get to the firefox configuration by typing "about:config" in the location bar. Once there, you can narrow the settings to "network.proxy". Now, edit the fields to configure things properly from behind your corporate firewall :) -Jeff 12:06, 12 March 2007 (EDT)

About internet access

I am very interested about the OLPC. I am a pc programmer too and I am interested on programming for other plataforms, like the Playstation2, cellphones, and now, to the OLPC, too. I know almost all about he OLPC, ecxept one thing: What are the plans about the Internet access on the OLPC particulary on Brazil?

You can find informations about this, in portuguese, at the DMU site

I think the platform is similar to all the other nations except the language is different. The subject matter is to reflect each nations individual lifestyle and customs. Brazil is also one of the first nations to receive the proto types.--216.194.7.250 11:54, 24 March 2007 (EDT)

Internet access

How is internet connectivity achieved?

OLPC laptops talk to each other in an ad-hoc mesh network. Each school has a server which connects laptops on the mesh to the internet. -Jeff 21:28, 9 March 2007 (EST)

What instruction set does the processor in the laptops have?

The Geode processor that is currently used in the laptops supports the full Athlon instruction set (including MMX and 3DNow!), plus Geode-specific instructions.

Random generator entropy

Hi, we came up with this issue at the 23c3 in a lecture about the /dev/(u)random generator in Linux. The algortihm gets most of its entropy from the harddisk. Because the OLPC lacks a hdd, this could be an issue, when you need a random number for cryptography at boot time. Of course the algorithm is still strong and sufficient enough for most applications (or at least i think so), but not as good as some people maybe think. (Other entropies: camera, microphone,...) (DustyDingo)

Your question is confusing, as I'm not versed in random number generators based on hard disk... Isn't the built in Flashdrive good enough? It acts like a conventional hard drive, but it's all memory. --Jeff

No, the flash is not good at all. Hard drives have unpredictable timing, and thus the kernel uses them to supply /dev/random data. The DCON chip really should be modified to include a random number generator that works based on electrical noise such as the thermal stuff in a semiconductor junction. (note: NOT a pseudorandom number generator) 24.110.145.57 19:40, 27 February 2007 (EST)

Hmm... Chaos Communication Congress... OK! So you are looking for a way to seed a random number generator from an on board OLPC component (mostly for cryptography a boot time). OLPC doesn't seem to prioritize encryption as a core value (it seems to go against the BitFrost mantra of transparency). That said, you've got a pair of WiFi like transmitters, a monitor, keyboard, touchpad, battery, etc. Does hard drive access time really provide an evenly distributed random number? I find that hard to believe. Also, is this topic really critical to the goals of OLPC as a project? --Jeff

The very first thing an OLPC XO does is generate a long-term public/private key pair. All the over-the-air stuff is at least cryptographically signed. If a kid publishes a Sugar XO bundle, it gets signed with his key. Hard drives are decent; the fast-moving air inside the drive provides randomness. The WiFi may be a tolerable choice; it's both public and subject to lack of input though. The monitor is no good. The keyboard and touchpad are OK, though very slow. The battery is unlikely to help. The digital camera may be the best choice. The microphone is tolerable. Use of many of these devices will require lots of power and/or background daemons. It's just way easier to do as Intel did with their motherboard chipsets. VIA put a random number generator right in the CPU. AlbertCahalan 22:14, 28 February 2007 (EST)

This is a serious issue. There's a paper on the quality of the linux kernel RNG, and how it has relied on obscurity. When people wanted to find out how it works, they got no help from the developers; after analyzing it, they found serious weaknesses, and published.

http://www.pinkas.net/PAPERS/gpr06.pdf

In a nutshell:

1. Linux RNG is overly complicated, and could be made much simpler at no loss of quality if a random source is available.
2. Linux RNG is predictable with no random source
3. A "must" for diskless systems is to save the RNG state across shutdown/bootup. At the very least, each laptop should ship with a 512 byte file fetched from random.org (or similar) so that they can initialize to an unknown state on first boot.
4. Instead of using the linux RNG, perhaps consider a better one. Apple claims that its RNG -- "Yarrow" -- is better than Linux's, however it warns that a lack of random input will degrade it without warning (versus linux's estimate of entropy remaining in the main pool).

I do **REALLY** hope that this is fixed before any "for end user" machines are shipped. --Keybounce 21:36, 31 March 2007 (EDT)

It is a serious issue, but that stuff about Yarrow being better is wrong. People get recognition by publishing alarmist "research" about supposed defects in important software. The Linux developers have little time to help clueless people who won't study the history behind the Linux /dev/random and /dev/urandom devices. Yarrow has one feature of dubious value: it recovers quickly from an attacker who somehow exposes the content of the pool. If an attacker can do that, you have bigger issues to worry about because the attacker is reading your kernel memory! Yarrow does have two weaknesses. First, it assumes that there will not be a successful attack against the cryptographic operations it uses. The Linux /dev/random and /dev/urandom instead assume that such attacks will be somewhat successful, and thus does not depend greatly on the cryptographic operations being unbreakable forever. Second, Yarrow fails to track entropy. Even if no data goes into the pool, you can pull infinite data out. This makes Yarrow a pseudo-random number generator. Linux makes a conservative estimate of the amount of true randomness available in the pool and will cause /dev/random to block (stall) if there is not enough available. 24.110.145.57 00:26, 1 April 2007 (EDT)

The AMD Geode LX processor includes a hardware random number generator. Linux's /dev/{u,}random uses it to seed the entropy pool. Also, keyboard and trackpad input are used to add to the entropy. There should be few issues with the quality of the random numbers.

Look at the Measure activity - it reads unbiased voltage data from the audio in port. I don't know how sensitive the a/d on that is, but if it's sensitive enough to get some random noise when there's no mic attached, this would be an excellent, constant source of random data (I saw an article once arguing that a noisy a/d is either brownian motion - which has quantum input from molecular vibration modes - or direct quantum tunelling of electrons in the chip. Quantum random = gold standard.). I don't know if there are Bitfrost/Raibow issues with accessing this port - I think that's only for the physical mic, not the port. --Homunq 11:06, 24 September 2007 (EDT)

School Gateways follow follow up

Thank you very much for the response on School Gateways -- I had a big misconception about the internet. I am still curious, however, about how the School Gateways for the mesh networks are intended to be powered, and how much energy they will require. I looked at the power page, and it mentioned microbial fuel cells, which is what I was going to ask about. Are the gateways going to require a lot more power than a microbial fuel cell could provide? Thank you!

---(JK, USA) There ought to be a sister project of the OLPC to bring internet connection to schools in the developing world. One internet connection per school wouldn't be a bad name for such project. Wireless Gateway/APs powered by environmentally friendly and renewable energy sources like solar or wind power, perhaps linked to a bidirectional satellite internet receiver, and then use [1]WifiPaypal so that donors in the developed world can donate mothly Satellite connection bill direct to the schools using Paypal.

• I think you should develop your idea and get about doing it. Gus, Chile

Yes, that would be great to get internet capabilities, I agree -- I hope you do start that up!

Does anybody know about the approximate power needs for the gateways? I know somebody working on microbial fuel cells and he asked me to find out what the power needs would be, and I just have no idea. I'm assuming that power is going to be a biggish issue for the gateways, as many of them will be in areas with no elecricity -- Am I wrong? Thank you!

This question might be bettered answered on one of the Tech pages.

RSS

Would it be possible to give LAPTOP NEWS RSS feed capability? I use a NewsGator RSS reader, and I like it very much. It saves me a lot of time, and the releases in each feed are always the most current when I log on. I try to check my feeds at least every 2 or 3 days. Thanks!

PenguinTV is one of the activities already running on the laptop; you can run an emulator and download the latest image of the OLPC environment to try it out for yourself. Sj talk

Accessibility

What mechanism olpc is going to adopt to make it accessable for child with physical disabilities? Will there be seperate keyboards for blind with braile? Will there be alternate input methods for child with dysfunctioning hands?

--Ankur Sharma, olpc Nepal

As far as I know, OLPC keybords are standardized for each country's language/s, but not braille. The OLPC has 3 USB ports to which external (braille) keyboards may be connected (quick search and sample result or alternative method). In order to better gauge the dimension of the issue, the World Health Organization (WHO) has some statistics on the incidence of blindness.

I have posted some observations about Dasher as an alternative input method, not only for physical disabilities but general use too. --Xavi 09:45, 21 December 2006 (EST)

Further to the question above, does the OLPC initiative include distributing laptops to children who are currently going through patient care in a hospital setting? And if so do you have links to devices that can allow a child to utilize a laptop from a hospital bed (i.e., wall mounted mechanical laptop ARM)? This is a great initiative!!!

Regards CReid

Color Coded Maps and Color Blind People

Would you please consider a written list of country status for those of us that are colorblind and can't make heads nor tails of your map?

There's an OLPC Status by Country page with a table - but darn! It too is color coded! ...just checked :(

I'll update it to make it text AND color coded.

It covers Africa, the Americas and Asia, and it's NOT official (iow, the coding of some countries could be wrong).

And yes, there should be a link to that table in the Countries section above and in the Map page.--Xavi 18:30, 21 January 2007 (EST)

Bad netiquette, answering to self, but it's already done! See OLPC Status by Country.

This question and it's answer will soon be moved to the #Country section above.--Xavi 18:58, 21 January 2007 (EST)

Technically, it's the governments buying the laptop that will distribute them (not the OLPC), and while I see no difference between a child in a hospital bed or a cabin in the mountains (from a distribution PoV), my guess is that hospitals in these countries have other priorities to allocate their budgets instead of fancy trays (as cool as they might be ;) --Xavi 08:05, 23 January 2007 (EST)

As a representative of an NGO type organization I just recently commented to a UN officer about a similar subject. “Fancy Trays”' are not always at the request of the country or donor agency in general. Part of what makes these items or services that may not at first glance seem functional is the vision of the donor. Just like the water go round in Africa sponsored by Ex US president Bill Clinton and the water see saw in another nation that promotes the washing of your hands. It is not always up to the receiver in what it is they are to receive . There are also many sites that go in-depth about theses issues and the how and why's of the matters. If you are interested in finding out more you can direct searches about: third world programs, world aid and I am sure you can find more information as to why a fancy tray may have been purchased or donated as well as many other interesting things.