• to get into root: <ctrl><alt><right-arrow>
• login as root. Default password is test0000

• <ctrl><alt>t then type shell

This step will alow the quick boot of Seabios and entering the Linux distro without pressing any key shortcut

We will set these flags:

GBB_FLAG_DEV_SCREEN_SHORT_DELAY 0×00000001
GBB_FLAG_FORCE_DEV_SWITCH_ON 0×00000008
GBB_FLAG_FORCE_DEV_BOOT_LEGACY 0×00000080
GBB_FLAG_DEFAULT_DEV_BOOT_LEGACY 0×00000400

with this command: # /usr/bin/set_gbb_flags.sh 0x489 or if that doesn't work # /usr/share/vboot/bin/set_gbb_flags.sh 0x489

Your flash should have been written now.

# crossystem dev_boot_usb=1 dev_boot_legacy=1 Not really needed? but just to make sure.

• reinstall Chrome OS
• tips after install

• write protect screw
• flags
• more developer info
• fixes

• disable right-clicking by clicking on right side of touchpad: add to ~/.xsessionrc: xinput –set-int-prop $ID “Button Right Click Enable” 8 0
• disable touch to tap: add to ~/.xsessionrc: xinput –set-int-prop $ID “Tap Enable” 8 0
• note that both of the above commands assume that ID has already been set as already appears in .xsessionrc: ID=`xinput | grep cyapa | cut -f 2 | sed -e 's/id=//'`

• remove https://www.chromium.org/_/rsrc/1381990807648/chromium-os/developer-information-for-chrome-os-devices/acer-c720-chromebook/c720-chromebook-annotated-innards.png|write protect screw]].
• with machine off hold down <refresh>(f3) and <ESC> and <POWER> to transition to developer mode
• go through initial setup and login as guest
• <CTRL><ALT>T to get to terminal, then shell then sudo -s
• /usr/share/vboot/bin/set_gbb_flags.sh 0x489
• burn Gallium OS onto flash drive using Etcher (ubootin didn't work)
• boot from flash drive
• replace write protect screw?