User:Kevgor
A collection of User Notes from Kevin Gordon of the Ntugi Group <ref>Ntugi Group Website</ref>
November 2011
Miscellaneous Technical Notes
Thanks to Daniel Drake, Mikus Grinbergs, Martin Langhoff, Peter Robinson, James Cameron, Richard Smith, Yioryos Asprobounitis, John Gilmore, Nathan C. Riddle, Gonzalo Odiard, Jon Wattlington, Jerry Vonau , and Sridhar Dhanapalan for all of their help on these things :-)
June 2012
Ntugi Group Reflash Documents
- User:Kevgor/Reflash to Standard Install Image using Ntugigroup USB stick
- User:Kevgor/Reflash to Custom Install Image using Ntugigroup USB stick
- User:Kevgor/Install Script for Labquest
- User:Kevgor/Install Script for mplayer
- User:Kevgor/Mavrothal scripts for XO 1.0
- User:Kevgor/Utilities rpms installed from USB for Testing phase
Install Developer Key
su - wget -P /security https://activation.laptop.org/devkey/xxxxxxxxx/develop.sig
Attach an XO to a Projector/External Monitor
The only tested products are: Startech USB2VGA2 adapter or Startech USB2VGA adapter
Ensure External device has a VGA input, and can display at 1024x768 60Hz
Plug in and power on the External device
Attach a VGA cable between the Startech device and the VGA port of the External device
Ensure the input selection on the External device is set to VGA. If possible, preset the resolution to 1024x768. Some monitors and projectors will not be able to sync properly to the USB2VGA. There is no known fix for this.
Ensure that the XO is powered off
Plug the USB end of Startech adapter into any USB port on the XO. If you do this more than once, you should always use the same USB port, as it will save time in configuration
Power on the XO
It is normal behaviour for the boot process to still start up on the internal screen.
Once the XO recognizes the external adapter, a blue light will illuminate on the adapter.
The XO will attempt to handshake with the adapter
This process may cause horizontal bars to appear until such time as 1024x768 resolution is set
Once the External monitor has control of the display, the internal screen will go into text mode. I.E. - no mirroring.
Using an external display will cause slower graphics throughput. Therefore, you avoid using the external display while cameras are active, for streaming video, or visiting graphics rich web sites. As they say these days, your mileage may vary.
Control will not return to the internal display until after a shutdown.
To boot without an external display, remove the USB end of the Startech cable before powering back on.
Special Note for the Aaxa m2 Projector for Point 4 above:
Power the projector on.
Repeatedly hit the rightmost key on the top wheel until the "VGA" appears
in the top-right corner of the blank blue projected image, to ensure that the External Device is set to VGA
Cheat keys
Boot-up
signed install - right game pad - all 4 game keys, on right-hand of display
text boot - right game pad - check-mark key, on right-hand side of display
boot to OFW - esc (X), keyboard key
diagnostics - left game pad - rocker left, on left of display
While Running
ctrl-alt-erase - restart sugar
Set Clock using serial adapter
At the ok prompt, type these commands to set the date (hitting enter after each one):
ok select /rtc
ok decimal
ok sec min hour day month year set-time
sec, min, hour, day, etc in the previous command should be numbers correlating to the current date. For the current time:
ok 20 08 18 23 12 2024 set-time
Set Clock using Linux
Once Linux has booted, login at a root terminal (e.g. press Ctrl+Alt+F1).
Set the system time using the date command, e.g. for the current date/time:
date --utc --set="2024-12-23 18:08:20"
Then shutdown normally and the system time will be stored in the clock.
(Don't force a shutdown by holding down the power button, because then the change won't be stored.)
Unsigned Build reflash commands from OFW ok prompt
XO1 - jffs2 from os-builder
copy-nand u:\osx.img
XO1 - ubifs
update-nand u:\osx.onu
XO1.5 and 1.75
fs-update u:\osx.zd4
OFW
flash u:\qxxxx.rom
Start cups service
/sbin/service cups start
Copy Kernel Files after kernel rpm install
cp -a /boot/* /bootpart/boot/
Check USB files
To check speed
ok null-fsdisk fs-update u:\fs.zd
To check sum specifically on the TBSF build
md5sum os26-4g.zd
You should have this string:
d0db56b3978eb4091efe805b0d4bc18e
FTP server
Link to brooksc OLPC News page on ftp on the XO <ref>Brooksc FTP notes</ref>.
pure-ftpd is now included in the standard repository packages, so one can just do a plain
yum install --nogpgcheck pure-ftpd
To manually start the service, non-persistent:
/sbin/service pure-ftpd start
USB ethernet auto-assign workaround
avahi-autoipd eth1
Battery/DC Notes
Battery Recovery Procedure on Wiki <ref>Battery Recovery Procedure</ref>
Troubleshooting Battery on Wiki <ref>Troubleshooting Battery</ref>
Power Mangement on Wiki <ref>Power Management</ref>
Please read the reference wiki pages for correct usage before executing any items from this following list of commands!! This list is *not* meant to be run as a script. It is merely a laundry list of commands to refresh my memory as to the correct spelling of those that are available. Also, since some commands from the batman.fth forth script are contained in the more recent firmware versions, one may get a 'not-unique' message when loading the script. It would appear these messages can be safely ignored.
At open firmware:
ec-abnormal@ . see-bstate watch-battery fload u:\batman.fth batman-start bat-recover bat-set-life-byd bat-set-low batman-stop
From Richard Smith on yellow wont go green
Next time you are using the machine stop powerd and run olpc-pwr-log
in a terminal (you can use it normally) and let it run down until it
powers off. Then remove the battery, power back up, run olpc-pwr-log
again and then re-insert the battery. Let it charge until you see the
got to 100 and the 3rd and 4th column of numbers reach some sort of
steady state where they don't change much. Ctrl-C and then send me
the file.
FYI. Col 3 is voltage in uV and col 4 is amperage in uA.
Also send me all the files you have in ~olpc/power-logs
Barrel specs:
- 1.67mm Center pin diameter
- 5.5mm Outer barrel diameter
- 11mm contact length
Trackpad/Keyboard commands
What kind of trackpad do I have?
dmesg | grep psmouse
Output from above command:
XO 1.5 newer CL1A = serio1: ID: 10 02 64
XO 1.5 older CL1A = synaptics
XO 1.0 = 50
Tap-to-click Persistent for older CL1/CL1A - edit the following file; to turn on set the param =1 or off =0
/etc/modprobe.d/olpc-psmouse.conf
Tap-to-click Non-Persistent for newer CL1A - to turn ON
echo -n C > /sys/bus/serio/drivers/psmouse/serio*/flags
Tap-to-click Non-Persistent for newer CL1A - to turn OFF
echo -n c > /sys/bus/serio/drivers/psmouse/serio*/flags
Place above commands in rc.local to make persistent
Adopt authority/permissions hint
add the NOPASSWD option in /etc/sudoers just for the scripts/commands you need
Sample yum syntax
For download only of yum updates to an External USB Volume PATRIOT with subdirectory called UpdateRpms
yum update --downloadonly --nogpgcheck --downloaddir=/media/PATRIOT/UpdateRpms
For installing rpms from a USB volume PATRIOT with subdirectory called UpdateRpms and no internet access
yum localinstall --nogpgcheck --disablerepo=* /media/PATRIOT/UpdateRpms/*.rpm
Install bad and ugly gstreamer files to USB
For download only of rpm's to an External USB Volume PATRIOT with subdirectory called Guvcview. This will alter the repos used for subsequent Updates, so delete rpmfusion repos later if you wish
yum install --nogpgcheck \ http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm \ http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm sleep 2 yum install --downloadonly --nogpgcheck --downloaddir=/media/PATRIOT/Guvcview \ gstreamer-plugins-bad gstreamer-plugins-ugly gstreamer-ffmpeg
Enable and Start Bluetooth service
To enable:
systemctl enable bluetooth.service ln -s ‘/lib/systemd/system/bluetooth.service’ ‘/etc/systemd/system/dbus-org.bluez.service’ ln -s ‘/lib/systemd/system/bluetooth.service’ ‘/etc/systemd/system/bluetooth.target.wants/bluetooth.service'
To start:
systemctl start bluetooth.service
Frequent Links for XO resources
XO diagnostics <ref>XO diagnostics</ref>
Developer Builds <ref>Developer builds</ref>
Quozl Forth lessons <ref>Forth Lesson 23</ref>
TBSF Build <ref>TBSF builds</ref>
Koji for arm rpms <ref>Arm rpms from Koji</ref>
Stable builds <ref>Stable builds</ref>
Enable Cups <ref>Enable CUPS</ref>
OS Builder Wiki <ref>OLPC-OS-Builder</ref>
Printing OLPC Notes<ref>Printing OLPC Notes</ref>
Printing Tony Pearson IBM Notes<ref>Printing Tony Pearson IBM Notes</ref>
OLPC News mavrothal page <ref>Mav ref page</ref>
Disassembly Instructions <ref>Disassembly Instructions</ref>
Manufacturer Data Legend <ref>Manufacturing Data legend</ref>
Notes on first steps on XO 1.75 B1 <ref>XO 1.75 B1 arrival </ref>
External links
References
Testing Notes for USB and add-ons for Current Signed +1 Developer Builds
Older Testing Notes
Completed Testing Notes for USB and add-ons for Previous Developer Builds
.
External links