Ubuntu Intrepid for the XO

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Revision as of 06:36, 23 March 2010 by 114.73.4.124 (talk)
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Alex Belits (alias Teapot) has released a customized version of Ubuntu Intrepid (8.10) for the OLPC XO.

This is an easy-to-setup, easy-to-use desktop operating system for the XO based on the rock-solid foundations of Ubuntu. It is ideal for G1G1 adult donors who would like to have a real desktop environment instead of Sugar or for children who are already used to more traditional computers.

When Ubuntu is installed, the Sugar installation is not affected. The whole OS boots/runs comfortably from the SD card. If the SD card is removed and the machine is restarted, you boot into Sugar. Sugar may also be booted without removing the SD card by holding down the "O" game key while powering up the XO.

It also has the most important power management features of Sugar so the XO can be used like a real laptop with it.

XO specific customizations

  • Deep suspend/resume works for closing/opening the lid
  • Automatic shallow suspend is supported by a custom script which activates shallow suspend if there is no user input and there is no high load on the system. This script can be easily activated/deactivated according to the needs. This can be used for ebook reading or browsing. Similar to advanced power management of Sugar.
  • Custom desktop theme with XO-friendly colors (green...etc)
  • Battery state of charge indicator works and charge percentage is included in the default desktop toolbar
  • Dedicated arrow buttons (left side of the screen) mapped as direction buttons (so can be used when browsing for example)
  • Game buttons are mapped as (Home/End, Page Up/Down), so these can be used for browsing or reading.
  • Screen rotation with the dedicated button (below the arrow buttons) is functional.

Notable features

  • Xfce desktop preconfigured with GDM, so the user gets a graphical login and desktop without extra setup. This desktop environment is suitable for the resources of the XO and advanced enough to work with.
  • Automatic login can be easily set-up with the GDM configurator, so if you want you can get directly into the desktop if you want (less secure but more comfortable)
  • Synaptic and GDebi are installed by default so newbies can install extra software by the GUI
  • Web browsing: Firefox 3.0.4 (installed by default but not very snappy), Firefox 3.5 (offering improved performance over FF3.0) can be installed via optional instructions below, or Opera 9.6 can be easily installed (starts much faster than Firefox, smaller memory footprint)
  • PDF capable: ePDFViewer by default, or Evince can be installed easily with Synaptic. These are very capable PDF viewer programs.
  • Flash capable: Flash v10 works in Firefox and Opera (after installing the plugin with Synaptic). Flash-enhanced websites seem to render correctly. Flash games and videos are too slow, but simple flash applets work.
  • Watching YouTube videos is supported with a dedicated download/watch program (TubeWatcher). (This is because Flash video playback is not fast enough to be enjoyable from within the browser) NOTE: Changes to the YouTube website now prevent TubeWatcher from functioning.
  • Java capable: Java JRE 1.6 u10 works without issues (after installing with Synaptic). Azureus works (advanced, Java based Bittorrent client).
  • FBReader (advanced ebook reader) can be installed with Synaptic.
  • All other Ubuntu Intrepid tested applications can be installed and used (AbiWord, Gnumeric, OpenOffice...etc)
  • Mplayer is installed by default. VLC Player can be installed easily and plays good-quality movies smoothly
  • Pidgin installed by default
  • Skype 1.3 works with headset (downloaded from skype.com, installed from package, audio device set correctly: see solutions)
  • Swap file can be easily created, so larger applications can be run on the 256 Mb physical RAM of the XO. A 256Mb swap is recommended for OpenOffice.
  • The above install can fit to a 2GB SD card but you won't have too much free space remaining. A 4GB SD card is recommended.

Not supported

The XO cannot hibernate like a normal laptop (that would further reduce inactive power consumption compared to deep suspend). However, suspend to ram (deep suspend) works and results in low power loss while the XO is not in use. Wacom driver for an external USB tablet is not installed.

Requirements

You will need at least a 2GB SD card and a 1GB USB memory device. A 4GB or larger SD card is recommended to provide adequate space for applications and data.

An unlocked laptop. Obtain a Developer Key for your XO: http://wiki.laptop.org/go/Activation_and_Developer_Keys

Upgrade your OLPC OS to at least version 8.2.0: http://wiki.laptop.org/go/Release_notes/8.2.0

Upgrade your OLPC Firmware to at least to the version q2e18 (should be installed automatically with OS 8.2.0): http://wiki.laptop.org/go/OLPC_Firmware_q2e18

Obtain the customized Ubuntu Intrepid via BitTorrent (from http://mars.illtel.denver.co.us/~abelits/torrents/OLPCFiles-intrepid-20081130.tar.bz2.torrent) and place the .bz2 file on a USB memory device.

BitTorrent on XO

If you do not have another computer with a BitTorrent client installed, you can install BitTorrent on the XO under Sugar and use it to download the file. Open Terminal and type:

sudo yum install bittorrent

Do not attempt to download the file to your XO's internal NAND flash memory, as the file is very large and you're going to have to copy it to a USB device anyway for installation.

Connect a USB drive. Start the BitTorrent client and download the file to the USB drive.

cd /media/${DEVICE}
bittorrent-curses ${URL}

... where ${DEVICE} is the filesystem mount point where your USB drive is mounted, and ${URL} is the link to the .torrent file above.

Installation Procedures

Boot your OLPC into Sugar and start the Terminal activity.

Caution: It is recommended to copy and paste all of the following commands into Terminal rather than typing them, as mistakes may render your system nonfunctional.

Connect the USB drive. Do NOT insert SD card yet. The process will fail if the SD card is already inserted. Open Terminal and type

mount | grep /dev/sd

It may take a few seconds for the USB drive to be noticed. Repeat until it returns a line like this:

/dev/sda1 on /media/${DEVICE}

... where ${DEVICE} is the filesystem mount point where your USB drive is mounted.

Become root:

su -l

Stop haldaemon:

/etc/init.d/haldaemon stop

Insert the SD card into the slot . All data on the card will be erased by the following commands, so ensure anything important has been saved to another device.

Erase MBR and partition table:

dd if=/dev/zero of=/dev/mmcblk0 bs=4096 count=1

Make the partition table:

echo -e ',,L,*\n\n\n' | sfdisk /dev/mmcblk0

Create the root filesystem:

mke2fs -jLOLPCRoot /dev/mmcblk0p1

Mount the filesystem and unpack the tarball onto it:

mount /dev/mmcblk0p1 /mnt
cd /mnt
tar xvjf /media/${DEVICE}/OLPCFiles-intrepid-20081130.tar.bz2

... where ${DEVICE} is the filesystem mount point where your USB drive is mounted.

Copy your developer key to the SD card:

cp /security/* security/

Reboot the computer

reboot

After booting into a new system, log in as user olpc with password olpcolpc, and perform final updates:

Click on the Network Manager icon at the bottom panel and select the wireless network you want to use. You will be prompted for the key or password, if one is required.

Start Terminal and complete the configuration:

sudo aptitude update
sudo aptitude safe-upgrade
sudo aptitude reinstall ssl-cert
sudo aptitude clean
sudo /etc/init.d/cups start
mkdir .mplayer
echo -e 'vo=sdl\nframedrop=1\nlavdopts=skiploopfilter=all:fast=1' > .mplayer/config
exit

Optional Steps

Change your password with this terminal command:

passwd

Enter olpcolpc as the current password, then enter the new password you intend to use twice.

Changing the password does not change the password for the network manager keyring. The keyring password will still be olpcolpc.

rm .gnome2/keyrings/login.keyring

will remove the old keyring. A new one will be created the next time you connect, allowing you to choose a new password.

Install any other packages/software you desire (gimp, inkscape, msttcorefonts , flashplugin-nonfree, OpenOffice.org, etc.) Certain Firefox extensions such as flashblock, adblock and noscript are very helpful on the XO.

After installing flashplugin-nonfree, run

sudo ln -s /etc/alternatives/firefox-flashplugin /usr/lib/firefox-addons/plugins/flashplugin-alternative.so

and install flashblock extension (the usual way, from the browser itself).

Upgrade the included Firefox 3.0 to version 3.5, which performs considerably faster on the XO.
Use Synaptic Package Manager under the System menu to install the "libstdc++5", "libnotify-bin" and w3m" packages.

Download the Ubuntuzilla .deb package from http://sourceforge.net/projects/ubuntuzilla/files/ubuntuzilla/ubuntuzilla-4.6.1-0ubuntu1-i386.deb and install by double-clicking.

Close Firefox.

Open terminal and type

ubuntuzilla.py

Answer the "y/n" questions to install Firefox 3.5.

Adding the "Default Full Zoom Level" extension will enable you to specify a default zoom level for browsing.

Adjust your clock:

Set your OLPC to the correct time zone:

sudo dpkg-reconfigure  tzdata

If your clock is still not set correctly, set it manually with

sudo date 102413252009

(the format is MMDDhhmmYYYY)

or set the clock automatically by synchronizing with a time server:

sudo ntpdate pool.ntp.org

You can make a swap file to improve performance in certain situations. In this example it's a 256MB file, so you need at least 256MB of free space on the SD card:
sudo dd if=/dev/zero of=/swap.bin bs=1M count=256 sudo chmod 600 /swap.bin sudo mkswap /swap.bin sudo swapon /swap.bin

If you want to remove it, disable swap first:

sudo swapoff /swap.bin
sudo rm /swap.bin

To re-enable swap after each reboot, run

sudo swapon /swap.bin

To automatically enable swap every time the system boots, add the following line to /etc/fstab file:

/swap.bin none swap defaults 0 0

To tell the system to swap as little as possible to reduce flash wear, add this to /etc/sysctl.conf

# Swap as little as possible
vm.swappiness=0

Use 

sudo nano filename

to edit those files and be very careful -- wrong entries can render your system unbootable).

To use aggressive power saving mode (suspend on inactivity):

sudo touch /etc/xo-suspend/aggressive

and rebooting will enable it

sudo rm /etc/xo-suspend/aggressive

will disable it

Enable automatic login to the desktop:

Go to "Settings > Login Window" and enter your password.

Choose "Xfce Session" as the Default session.

Bring up the Security tab and select Enable Automatic Login.

Note: You will still be prompted for your keyring password to connect to your network every time you log in, which pretty much defeats the purpose of enabling automatic login. You can eliminate the keyring password as well, but that requires storing all of your passwords in plain-text. This is not recommended, but if fully automatic login is more important to you than password security, delete your existing keyring with:
rm .gnome2/keyrings/login.keyring

The next time you reboot and connect to an encrypted network, you'll be prompted for the network password. You will then be prompted to create a keyring. Leave both password boxes blank and click "Create." Confirm that you want to store your passwords unencrypted by clicking "Use Unsafe Storage."

Warning: Anyone who gains physical or remote access to your user account files can now see all of your passwords.

To back up your Ubuntu installation:
Boot into Sugar by holding down the "O" game key while turning on your XO. Release the game key when directed.

Connect a USB memory device. Open the terminal and type

su
df

Note where the USB and SD are mounted. The SD is at /media/OLPCRoot and the USB should be /media/USB-device-name. Then type

cd /media/OLPCRoot
tar cvzf /media/USB-device-name/file-name.tgz ./

This is a lengthy process and will take some time to complete. The exact time required depends upon the contents of your SD card.

You can give your tgz file any name you want.

To restore your backup to the same SD card, use the Sugar terminal to enter

su
cd /media/OLPCRoot
tar xvzf /media/USB-device-name/file-name.tgz ./

To restore your backup to a new SD card, follow the same procedures you used to install Ubuntu for the first time, but substitute the "tar xvzf filename" command above for the "tar xvjf filename" in Teapot's installation instructions.

For proper operation of a mobile device to access wireless broadband, the ppp package is missing and the olpc user has to be added to the dip group: 

sudo apt-get install ppp
sudo usermod -G dip -a olpc

Now the NetworkManager Applet should work just find with many mobile handsets connected via USB, i.e. Sony Ericsson K600 or K800 series. Just configure your network operators connection settings there and connect like a WLAN.

Tips and Tricks

To enable the monochrome 200dpi "reader" mode, press the Frame key in the upper-right corner of the keyboard.

The Bulletin Board key (between the volume control keys and the Frame key) is mapped as F11, which toggles between fullscreen and windowed-mode for many applications.

Fixes

If the mic light of the XO is always illuminated, un-check the "V_REFOUT enabled" box in the sound control panel and in the terminal type

alsamixer -V all

Navigate with the arrow keys to the last entry and set it to "MM" by pressing "m". Press Esc to quit.

Useful Links

The complete install instructions, in-depth discussion, current download link and general support (OLPC News thread)

Solutions for typical customizations and problems (OLPC News thread)

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