This markdown file explains how to run Ubuntu on your Acer CB3-111-C670 Chromebook from a USB 3.0 flash drive.
NOTE: We are using a USB 3.0 flash drive with Linux installed with persistent storage, since the internal eMMC storage is slower than USB 3.0.
Remove all 12 screws from the back of the laptop and remove the rear cover. Remove the write protection screw Reassemble machine
You first need to put your chromebook in developer mode.
To invoke Recovery mode, you hold down the ESC and Refresh (F3) keys and poke the Power button.
To disable OS verification you first invoke Recovery, and at the Recovery screen press Ctrl-D (there's no prompt - you have to know to do it). It will ask you to confirm, then reboot with a warning that OS verification is off
At the screen warning that OS verification is off, wait 30 seconds or press Ctrl+D to enable Developer Mode.
Dev-mode works the same as always: It will show the OS verification off warning screen and you need to press Ctrl-D or wait 30 seconds to continue booting.
Once you enable Dev-mode, the chromebook will be factory reset and you will be required to wait 30 seconds or press Ctrl-D every time the system boots (not often). Security features will be will also be disabled, but you will now be able to use the Crosh shell.
After you reboot into Developer mode, you'll need ot enable debugging features to set a root passowrd and enable shell access.
Click the link for "Enable debugging features".
Enter the new root password
Press Ctrl + Alt + Fwd (F2)
login as root with the root password you created earlier
Once you are logged in as root, then type the following to disable write protection:
flashrom --wp-disable
flashrom --wp-status
Write protection is now disabled, allowing you to boot from USB.
After disabling write protection, reboot and login as root
https://mrchromebox.tech/#fwscript but do it with root and not sudo
choose opiton 1 for install/update rw_legacy firmware
enable default boot from USB
put in usb 3.0 and reboot
https://raw.githubusercontent.com/kenorb-contrib/isorespin/master/isorespin.sh
While you wait, install the Crouton Integration extension so that you can run Linux in a window.
Once Ubuntu is installed, you can type sudo startxfce4 in Crosh's bash shell to enter the Ubuntu environment. Before watching video, you need to install VLC. You can right click on the desktop (two finger tap) and choose Open Terminal Here. In the terminal, type sudo apt-get install vlc, enter your password, and respond y to the prompts. You will now be able to run VLC on your chromebook.
To use the Ubuntu desktop with VLC, you always have to perform the following steps:
# Press 'ctrl alt t'
shell
sudo startxfce4
Once in Ubuntu, you can close the environment by logging out or closing the window. Otherwise, you can switch between Ubuntu and Chrome OS by pressing ctrl alt shift <- where <- is the left arrow key. You may need to switch to ChromeOS to adjust the volume or brightness. You also need to remember to press ctrl d whenever the system boots.