Comment # 12 on bug 1151290 from Dr. Werner Fink

Created attachment 822336 [details]
/var/log/Xorg.1.log

(In reply to Stefan Dirsch from comment #11)
> Ok. So that was not the reason. Nice try. :-(
> 
> Thanks for the pointer to the debian bug! Indeed looking for an update of
> ucode-intel package (Intel CPU/GPU firmware) is a good idea. You should at
> least try it.
> 
> I'm afraid all you can do is install debug packages and enable writing core
> files, so you see some more useful information here.

Even with latest ucode-intel package ', the crahses remain :(