[snb] stale TLB entries -> hang with random IPEHR

[Harry_debug]

Hi,
I'm victim of freezes (maybe GPU hangs). The mouse can't move. When there is sound playing, it freezes too.
Sometimes hangs lasts 10 seconds and other times, 10 minutes are not sufficient nad it requires hardware reboot.
It happens randomly (means that I don't know what caused the freezes) and I tried but can't reproduced it.

"$ ubuntu-bug xserver-xorg-video-intel" tells me that erport the bug is impossible and that I have to join ubuntu support.

I saw thoses bugs related but don't know if there is a real link (IPEHR, chips and kernels are different...) :
#1102390 [sandybridge-m-gt2] False GPU lockup IPEHR: 0x01800100 IPEHR: 0x0b140001
#1111094 [sandybridge-m-gt2] False GPU lockup IPEHR: 0x01800001 IPEHR: 0x0b140001
#1119402 [sandybridge-m-gt2] GPU lockup IPEHR: 0x7a000003 IPEHR: 0x0b140001
#1135473 [sandybridge-m-gt2 mesa] GPU lockup IPEHR: 0x7a000002 IPEHR: 0x0b140001
#1154591 [sandybridge-m-gt2+] False GPU lockup IPEHR: 0x3b000000 IPEHR: 0x0b140001
#1156004 [sandybridge-m-gt2] False GPU lockup IPEHR: 0xfffefefe IPEHR: 0x0b140001
#1157507 [sandybridge-m-gt2] GPU lockup IPEHR: 0xbf4f0000 IPEHR: 0x0b140001

This is my configuration (I added things that I've read from other and might be important):
Ubuntu Precise 12.04 i686
Notebook: Clevo W150HRM
Processor and iGPU: Intel core i5-2520
Graphics dGPU: nVidia GT555M
Hard drives: main Crucial C300 and slave 1TB Seagate

I join the crash logs contained in /var/crash and a lspci list.

[Chris Wilson (ickle)]

The common here is the TLB invalidate bug. It is fixed in v3.8 (raring), someday someone may backport the fixes.

[Harry_debug (ouinouinnn-gmail)]

Thank you very much ! For all your work ! (Isaw that your everywhere on bug.launchpad and on kernel changelogs !

I put a link here to the three commits you showed to others.
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1157649/comments/15

Thanks again !
(I hope it wil not take too long time to backport the fixes)

[Harry_debug (ouinouinnn-gmail)]

Fix committed and released on Ubuntu Raring but not yet backported to Ubuntu Precise LTS

[Chris Wilson (ickle)]

Patches required:

commit 3ac7831314eba873d60b58718123c503f6961337
Author: Jesse Barnes <email address hidden>
Date: Thu Oct 25 12:15:47 2012 -0700

    drm/i915: PIPE_CONTROL TLB invalidate requires CS stall

commit 9a28977181724ebbd9bdc45291cf29da55a729ee
Author: Jesse Barnes <email address hidden>
Date: Fri Oct 26 09:42:42 2012 -0700

    drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op v3

commit 7d54a904285b6e780291b91a518267bec5591913
Author: Chris Wilson <email address hidden>
Date: Fri Aug 10 10:18:10 2012 +0100

    drm/i915: Apply post-sync write for pipe control invalidates

[Nicolas Krzywinski (nsk7even)]

Thanks guys!
How can I find out when this will be backported to Ubuntu 12.04 LTS?

This error occurs to me with kernel 3.2.0-39 while it seems to work without problems with kernel 3.2.0-38 on my production machine - therefore I switched to the latter kernel for now.

I came here via https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1160151 and this is how I am able to immediately reproduce the bug. I simply have to hover over docky.

[luh3417 (raen)]

I believe I am having the same bug issue on 12.10 AMD64 3.5.0-26-generic
lspci attached

running i7 CPU with nvidia graphics card and drivers system freezes intermittently; hope it is possible to backport big fix for 12.10 AMD64

If you require particular logs please advise which and will gladly provide.

[phobos (b3phobos)]

Hi guys.
Ubuntu 12.10 x86. I installed the 3.5.0-27-generic and the problem is still present. I went down to the kernel 3.5.0-25, errors appear, but I can work.