wiki/Samsung_Chromebook.md

Better touchpad responsiveness

Create the file /etc/X11/xorg.conf.d/50-touchpad.conf and add the following to it:

Section "InputClass"
        Identifier              "touchpad"
        MatchIsTouchpad         "on"
        Option                  "FingerHigh"    "5"
        Option                  "FingerLow"     "5"
EndSection

Enable audio

1. Install alsa-utils: pacman -S alsa-utils
2. Run alsamixer as root.
3. Arrow right until you see four items starting with Left Speaker Mixer, and press M on all four channels to un-mute them.
4. Arrow right some more until you find four more starting with Right Speaker Mixer and un-mute them as well.
5. Arrow all the way back left to the Speaker channel and raise the volume a little. Keep it low (< 50ish), since alsa will let you get dangerously high for these speakers.

Suspend when closing the lid

Install acpid and pm-utils: pacman -S acpid pm-utils

Edit /etc/acpi/handler.sh and near the bottom you'll see the button/lid section. Add pm-suspend to the close section to look like:

button/lid)
    case "$3" in
        close)
            logger 'LID closed'
            pm-suspend
            ;;

Enable and start acpid:

systemctl enable acpid
systemctl start acpid

Closing the lid will now trigger a suspend, and opening it will wake the system.

User permissions for backlight control

To allow all users to modify the backlight control at /sys/class/backlight/pwm-backlight.0/brightness, create and edit the file /etc/tmpfiles.d/brightness.conf with these contents:

f /sys/class/backlight/pwm-backlight.0/brightness 0666 - - - 800

On boot, systemd will now set the permissions of that control file to be world writable. Acceptable values are 0-2800.