Acer Chromebook C720 - ZHN - Linux Install
|Cost on eBay:||US $34.86|
|With Tax:||US $37.95|
|CPU:||Intel Celeron 1.4GHz|
- Backup anything in your “Downloads” directory.
- Create a recovery drive:
- Download “Chromebook Recovery Utility” from the web store
Enable Developer Mode
- Shutdown your chromebook
- Hold Esc + Refresh (F3) buttons and tap the power button
- Press Ctrl+D when you see: “Chrome OS missing or damaged.”
- Hit “Enter” to turn off OS verification.
- Wait to start up
- Login as guest or a normal user
Open a root shell and enable legacy mode
- Ctrl+Alt+t to open a crosh terminal
Enable Legacy BIOS mode and USB boot: shell sudo bash crossystem dev_boot_usb=1 dev_boot_legacy=1
Disabling the Write Protect Screw and Setting BIOS Flags
WARNING - This will void your warranty but you probably don’t care with a laptop this old anyway.
This step is optional but really helpful.
Issues that are resolved by doing this:
|Need to hold ctrl+l at every boot to boot from HD or USB|
|Pressing “space” at the start ups screen it could re-enable OS verification which would break the system and require you to re-install the OS.|
|Letting the battery run down to 0% can disable Legacy Mode which would then require an OS re-install.|
- Power off
- Remove power cable
- Remove 13 screws ( 1 hidden under warranty sticker )
- Remove plastic covering
- Remove write protect screw ( at the corner of the battery )
- Put everything back together
- Boot back up
To disable write protect and set legacy boot to default so it won’t be lost by power loss open a shell ( Ctrl+Alt+t ) and run the following commands. Pay attention to the output.
shell sudo bash flashrom --wp-disable /usr/share/vboot/bin/set_gbb_flags.sh 0x489
- Boot and install Linux using a USB drive as you normally would.
- NOTE - press the escape key to open the boot menu
- DON’T press the space bar on boot.