Comment # 8 on bug 1206683 from Takashi Iwai

It's quite difficult to debug without any logs and hardware details.
Please try to get the hwinfo outputs from the last working kernels, and check
whether you get any relevant kernel errors in the past log at crashing.

At next, make sure that the issue is reproduced without Nvidia binary-only
stuff.  We cannot debug it with Nvidia driver due to the obvious reason.

Also, verify whether it's about the graphics driver or not; you can boot with
nomodeset for testing.

Last but not least, installing kdump and getting the crash dump (at least the
last dmesg output) would be really helpful.