Bug 523310 – Application crash after kernel fails to initialize render rings on some intel graphics cards

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Francisco Blas Izquierdo Riera (RETIRED) 2014-09-20 17:35:53 UTC]

Starting with hardened sources 3.15.4 after suspending to RAM and then reloading the system the kernel may eventually output this:
[drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 head ffffff8804 tail 00000000 start 000e4000

When that happens it is impossible to use xv and applications using any form of opengl (which includes at least firefox and glxgears). Die inmediately with the error:
intel_do_flush_locked failed: Invalid argument

Apllications using xv just refuse to show anything.

Reproducible: Sometimes

Steps to Reproduce:
1. Supend to ram
2. Resume
Actual Results:  
Kernel shows a line like:
[drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 head ffffff8804 tail 00000000 start 000e4000

Applications using openGL die and applications using xv show no output

Expected Results:  
The following line is not shown:
[drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 head ffffff8804 tail 00000000 start 000e4000

And everything works as expected.

The following kernel patch seems to solve the issue:
https://bugs.freedesktop.org/attachment.cgi?id=104224

[Comment 1 Francisco Blas Izquierdo Riera (RETIRED) 2014-09-20 17:37:06 UTC]

Assigning to the kernel team.

[Comment 2 Mike Pagano 2014-09-22 22:51:11 UTC]

Hello, Francisco,

As 3.15 is EOL, I was not planning on releasing another version. Do you want to see this in 3.16 ?

Mike

[Comment 3 Mike Pagano 2014-12-23 16:37:49 UTC]

patch available in kernels >= 3.17