Bug 94571

Summary: Random stack traces on Ironlake since 3.19.1
Product: Drivers Reporter: Coacher (itumaykin+kernel)
Component: Video(DRI - Intel)Assignee: intel-gfx-bugs (intel-gfx-bugs)
Status: RESOLVED MOVED    
Severity: normal CC: intel-gfx-bugs
Priority: P1    
Hardware: All   
OS: Linux   
URL: https://bugs.freedesktop.org/show_bug.cgi?id=89108
Kernel Version: 3.19.1 Subsystem:
Regression: No Bisected commit-id:
Attachments: lspci -k -vvv
dmesg output with stack traces examples

Description Coacher 2015-03-09 01:57:13 UTC
Created attachment 169921 [details]
lspci -k -vvv

Hello.

After kernel upgrade from 3.18.7 to 3.19.1 I occasionally get stack traces related to drm_wait_one_vblank() in my dmesg. I haven't figured out the exact conditions for these traces to appear, but they tend to appear more often while browsing in Firefox or running VirtualBox. I had no such problems on 3.18.7. When these traces appear everything seems to run as usual, except for VirtualBox, which becomes very very slow.

My OS is Gentoo amd64 with vanilla kernel 3.19.1. If you need any additional info I am ready to provide it.
Comment 1 Coacher 2015-03-09 01:58:19 UTC
Created attachment 169931 [details]
dmesg output with stack traces examples
Comment 2 Jani Nikula 2015-03-09 09:06:05 UTC
Can't dupe a bug on another bugzilla, but it's this one:
https://bugs.freedesktop.org/show_bug.cgi?id=89108

Hopefully will be backported to v3.19.y.
Comment 3 Coacher 2015-03-10 08:10:56 UTC
(In reply to Jani Nikula from comment #2)
> Can't dupe a bug on another bugzilla, but it's this one:
> https://bugs.freedesktop.org/show_bug.cgi?id=89108
> 
> Hopefully will be backported to v3.19.y.

Thank you very much for your quick and useful response.