[Intel-gfx] frequent x crashes with gen6/sna

[Daniel Vetter]

On Mon, Oct 17, 2011 at 02:37:21PM +0200, Dieter Mummenschanz wrote:
> Hi Daniel,
> 
> no problem. dmesg.log attached. 
> To reproduce the hang: try to play two or more bluray streams at once
> and probably a hires wmv stream as well using mplayer-vaapi. also run a
> opengl game like Quake3 or prboom-plus
> (http://prboom-plus.sourceforge.net). You'll need an additional "pwad"
> file for prboom. PM me for that. With everything up and running, open a
> browser and do normal desktop work. That'll do it. Sometimes after a
> minute - sometimes after an hour. One more thing: I have a mobile
> i7-2620M chip, no additional gpu, running with cpufreq-tools on demand.
> The Notebook runs on AC Power all the time.
> 
> If I can help in any way (testing patches, etc), please let me know :-)

As I kinda expected, you're running with VT-d/DMAR switched on. That's
implicated in quite a few rc6/strange hang reports already. Can you check
what happens when you turn that off, either in the bios or with

intel_iommu=off

on the kernel cmdline?

Thanks, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48