A little late to the party, but I also have a libreboot C201, and have successfully installed mainline Debian on a USB drive connected to it. I'm going to put up a comprehensive guide + shell scripts in December when I'm on break from school, but until then, check out these links:

https://github.com/atopuzov/c201/blob/master/debian-install....

https://archlinuxarm.org/platforms/armv7/rockchip/asus-chrom...

The main thing I haven't gotten working yet is the touchpad. For wifi, I'm using an atheros dongle with open firmware.

The gallium os guys have everything working perfectly on my asus chromebook.

Yes, but gallium doesn't support arm [1]

[1] https://wiki.galliumos.org/Support/ARM

See https://johnlewis.ie/custom-chromebook-firmware/rom-download...

Doesn't work for every Chromebook, but it does for many. Working fine on my Chrome Box.

I already had flashed libreboot onto the device. That wasn't hard. The problem was and is mainline Linux support.

Ahh. Maybe this? https://github.com/altreact/archbk

Thanks for the link. The C201 is listed as work-in-progress.