Comment # 29 on bug 954783 from Takashi Iwai

(In reply to Jozef Kovac from comment #28)
> with sysrq-trigger works fine.

OK, so it implies that the crash isn't a normal kernel logic error, but it's
directly crashing to the system stall or reset.  Too bad.  Then the only way to
watch is via serial console.  Or with some luck, we might be able to catch the
log via netconsole.

Basically without a crash log, we can't assume even that it's the similar as
the bug you pointed (https://bugs.freedesktop.org/show_bug.cgi?id=92258).

So, for now, the most important thing is to get any kernel log showing the
crash.  Then another thing to check would be to test the newer kernel (e.g.
FACTORY 4.3 kernel) and/or test the newer X packages (available in OBS X11:XOrg
repo).