Acer Chromebook 14 CB3-431 (Edgar)
The following article briefly explains all necessary procedures to install a fully-functional Arch Linux configuration on the Acer Chromebook 14 cb3-431 (Edgar).
Write Protection does not have to be voided to follow this guideline.
Prior to the installation, certain actions must be taken to grant bios reading permission on unsigned installation mediums. This includes enabling Developer Mode, and flashing a custom SeaBios.
Enabling Developer Mode:
- Power off your machine.
- Enter recovery mode by holding down
Esc+F3(Refresh) during boot.
- Once greeted in recovery mode (large yellow exclamation mark) press
- You will be prompted for confirmation, press enter to confirm developer mode.
- The device will reset and greet the user with a warning screen on every boot, that can be skipped by pressing
Flashing a custom SeaBios
A custom SeaBios is required to load unsigned or self-signed installation mediums, in our case, being the Arch Linux Installation Media.
In ChromeOS, estasblish internet connection and enter the superuser shell with
Ctrl+Alt+F2 using the
chronos username. Then obtain MrChromeBox's SeaBios utility:
# curl -L -O https://mrchromebox.tech/firmware-util.sh
Execute the firmware utility:
# bash firmware-util.sh
Select option 1 to Install RW_LEGACY, permitting booting from an external installation media from SeaBios.
Before selecting the reboot option and proceeding to the next part, ensure an Arch Linux Installation Media is inserted.
Booting the Installation Media
During the white "OS verification disabled" screen, toggle
Ctrl+l to enter SeaBios.
Then press the
Esc key to load the boot menu, and select your external installation media.
Unless the installation media runs on a Linux version 4.8.14 or prior, the internal keyboard, sound, and trackpad will not function during the installation. From this point on, proceed with the official Arch Linux Installation Guide.
Esckey boot menu request, the device has been fully shut down prior to the SeaBios load. SeaBios must be entered on reboot from ChromeOS to enter the Boot Menu
Unless RW protection has been voided and SeaBios has been set to boot as default, booting into grub is only possible by toggling
Ctrl+l during the white "OS verification disabled" screen on boot.
Due to the recentness and unpopularity of the new Intel Braswell Chipset, a fair amount of issues must be fixed manually.
The following features are not expected to work out of box :
- Internal Keyboard
Fixing those issues will require the user to compile and apply the patchedAUR kernel and follow the proceeding steps below:
The internal keyboard becomes fully functional after the kernel has been patched, with the exception of hotkeys, which must be configured trough theAUR package.
To fix audio/sound output, install the
pacman --force parameter.
To fix trackpad pressure sensitivity issues for the
Section "InputClass" Identifier "touchpad catchall" Driver "synaptics" MatchIsTouchpad "on" MatchDevicePath "/dev/input/event*" Option "FingerLow" "1" Option "FingerHigh" "5" EndSection
libinput:name:*Elan Touchpad:dmi:*svnGOOGLE:*pnEdgar* LIBINPUT_ATTR_PRESSURE_RANGE=1:15
After the XServer has been restarted, the changes will take place