Guide acer-c720-ubuntu

Published on March 14th, 2014 | by admin

Turn the C720 in a permanent linux laptop (Tutorial 1/3)




Steps to turn the acer c720 in a permanent Linux laptop:

Remove the write lock screw:

Remove all the screws in the back cover including the one under the warranty seal (this obviously voids the warranty). The plastic cover comes out pulling from the screen with the nails.

acer-c720-back-screws

Remove the write lock screw.

acer-c720-inside

Number 7 on the picture above.

Close the back cover with only the battery lock screw.

On boot it will complain that chromeos is broken

Reinstall chrome os from factory with an usb stick.

You will need  4 GB or larger USB flash drive or SD card.

Go to another computer  and download a tool to create the bootable image

Now star your Chromebook and when the “Chrome OS is missing or damaged” screen appears, insert the USB flash drive or SD card you created into the USB port or SD card slot on your Chrome device and follow the instructions.

Now that chromeos is installed back, go to a terminal (ctrl+alt+ ->) and login as chronos, then sudo su.

Set friendly bios flags:

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

# /usr/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.

Now remove the back cover again and reinstall the write lock screw to protect the bios.

Screw all the screws.

Plug in an usb stick with ubuntu 13.10 amd64, should boot automatically.

To crerate a USB disk or SD Card with Ubuntu under Windows  download http://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/ and follow the instructions.

You will need a usb mouse at this stage because the touchpad wont work without some tweaks.

Credits: Pedro Larroy

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4 Responses to Turn the C720 in a permanent linux laptop (Tutorial 1/3)

  1. asandst1 says:

    How do you reverse this and get the bios back to factory specs.

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