README.md

pixel_native

Running Ubuntu on the Chromebook Pixel 2 LS (Samus) natively.

Ubuntu 16.04

Install ectool

git clone https://chromium.googlesource.com/chromiumos/platform/ec
cd ec
sed -i 's/\(COMMON_WARN =\)/\1 -Wno-error=maybe-uninitialized/' Makefile.toolchain
make BOARD=samus build/samus/util/ectool

Install raphael/linux-samus kernel

• Check current kernel

  $ uname -a
  Linux neutrino 4.8.0-22-generic #24-Ubuntu SMP Sat Oct 8 09:15:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
  

• Install linux-samus kernel

  git clone --depth=1 https://github.com/raphael/linux-samus
  cd linux-samus/build/debian
  sudo dpkg -i *.deb
  
  sudo update-grub
  sudo shutdown -r now
  

• Verify new kernel

  $ uname -a
  Linux neutrino 4.9.6-ph+ #17 SMP Fri Jan 27 11:38:18 PST 2017 x86_64 x86_64 x86_64 GNU/Linux
  

Fan control

Dependencies:

• "Install ectool" section

Steps:

• Turn off all fans

  sudo ~/env/ec/build/samus/util/ectool --interface=lpc fanduty 0
  

External display

• The cable

  • Google USB-C to Displayport Cable

• Plugging in the cable

  • It's directional, lol: raphael/linux-samus#162 (comment)

• Configuring xrandr modes

  • Laptop Monitor On, External Monitor On

    xrandr --output "eDP-1" --primary --auto --output "DP-1" --right-of "eDP-1" --auto
    

  • Laptop Monitor Off, External Monitor On

    xrandr --output "eDP-1" --off --output "DP-1" --primary --auto
    

  • Laptop Monitor On, External Monitor Off

    xrandr --output "DP-1" --off --output "eDP-1" --primary --auto
    

  • References

    • https://wiki.archlinux.org/index.php/xrandr

• Configuring different DPIs

  • References
    • http://askubuntu.com/questions/393400/is-it-possible-to-have-two-different-dpi-configurations-for-two-different-screen

X11 acceleration

Dependencies:

• linux-samus xaccel.sh script

Steps:

• Install dependencies

  $ sudo apt-get install xserver-xorg-video-intel
  

• Run the setup script

  $ cd ~/env/linux-samus/scripts/setup/xorg
  $ ./xaccel.sh
  

Trackpad

Dependencies:

• linux-samus scripts/setup/brightness/* scripts

• 'Trackpad' section of "crouton unity i3wm" gist

Steps:

• RUn the enable-atmel.sh script

  cd ~/env/linux-samus/scripts/setup/touchpad/
  
  ./enable-atmel.sh
  

• Install and configure touchpad-cmt-samus

  sudo add-apt-repository --remove ppa:longsleep/pixel-extras
  sudo apt-get update
  sudo apt-get install libevdevc libgestures xf86-input-cmt
  
  sudo mv /usr/share/X11/xorg.conf.d/50-synaptics.conf /usr/share/X11/xorg.conf.d/50-synaptics.conf.old
  sudo cp /usr/share/xf86-input-cmt/50-touchpad-cmt-samus.conf /usr/share/X11/xorg.conf.d/
  

• Verify configuration

  cat /usr/share/X11/xorg.conf.d/50-touchpad-cmt-samus.conf
  cat /usr/share/X11/xorg.conf.d/40-touchpad-cmt.conf
  
  xinput list-props 'Atmel maXTouch Touchpad'
  

Keyboard

Laptop keyboard

ll X/pixel_native/keyboards

cat ~/.xsessionrc
xkbcomp ${HOME}/env/keyboard/server-0.xkb.pixel_ubuntu_samuskernel_mod ${DISPLAY} 

External keyboard

References

• http://askubuntu.com/a/337431

Display brightness controls

Dependencies:

• linux-samus scripts/setup/brightness/* scripts

Steps:

• Use linux-samus

  cd ~/env/linux-samus/scripts/setup/brightness/
  

• Run the setup script

  ./setup.systemd.sh
  

• Enable the service

  systemctl enable enable-brightness.service
  

• Configure keyboard keys via i3. Add to ~/.config/i3/config:

  bindsym XF86MonBrightnessUp exec brightness --increase
  bindsym XF86MonBrightnessDown exec brightness --decrease
  

Keyboard LED

Dependencies:

• All steps in "Display brightness controls"

Scripts:

• Turn off keyboard LED

  echo 0 > "/sys/class/leds/chromeos::kbd_backlight/brightness"
  

Ubuntu 18.04

Keyboard

Same as 16.04

Display brightness controls

Same as 16.04.

Keyboard LED

Same as 16.04.

Trackpad

The default libinput trackpad driver seems to work well.

Get info:

• xinput
  

• xinput list-props 'Atmel maXTouch Touchpad'
  

Test configuration parameters live:

• xinput set-prop 'Atmel maXTouch Touchpad' 'libinput Accel Speed' 0.8
  

Configuration:

• The default config already exists:

  cat /usr/share/X11/xorg.conf.d/40-libinput.conf
  

• An override file exists with custom configs:

  cat X/pixel_native/50-touchpad-libinput-martin.conf
  

• Install the override config via:

  sudo cp X/pixel_native/50-touchpad-libinput-martin.conf /usr/share/X11/xorg.conf.d/
  

Audio

• Enable the audio

  ./home/martin/env/linux-samus/scripts/setup/audio/enable-audio.sh
  ./home/martin/env/linux-samus/scripts/setup/audio/enable-speakers.sh
  

• Create symlinks

  sudo ln -s ~/env/linux-samus/scripts/setup/audio/volume-up.sh /usr/local/bin/volume-up
  sudo ln -s ~/env/linux-samus/scripts/setup/audio/volume-down.sh /usr/local/bin/volume-down
  sudo ln -s ~/env/linux-samus/scripts/setup/audio/mute-toggle.sh /usr/local/bin/volume-mute-toggle