I'm using an Acer C720P with the GalliumOS kernel.
Everything works perfectly, except occasionally when opening the screen, I need to `sudo service network-manager restart` to get connected to the WiFi. It doesn't see me network unless I do that. It's only once in a while so I haven't bothered trying to fix it.
I used these guides to help set things up:
https://samsclass.info/128/proj/chromebooks3.htm
https://ubuntuforums.org/showthread.php?t=2228539