same problem here, c720p chromebook , happens on several different distros like arch, ubuntu, xubuntu. I downgraded to the 4.1.x kernel and the issue is less frequent (needs much more memory pressure to trigger). then I downgraded to the 3.17 kernel and the issue is gone completely. all the previous suggestions and workarrounds didn't work for me. only downgrading the kernel did.
same problem here, c720p chromebook , happens on several different distros like arch, ubuntu, xubuntu. I downgraded to the 4.1.x kernel and the issue is less frequent (needs much more memory pressure to trigger). then I downgraded to the 3.17 kernel and the issue is gone completely. all the previous suggestions and workarrounds didn't work for me. only downgrading the kernel did.