Bug 16191

Summary: kernel upgrade breaks 3D-graphics (glxgears is black, sometimes flickers)
Product: Drivers Reporter: florian.a.jung
Component: Video(DRI - non Intel)Assignee: drivers_video-dri
Status: RESOLVED CODE_FIX    
Severity: normal CC: alexdeucher
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.34 Subsystem:
Regression: Yes Bisected commit-id:
Attachments: output of lspci
output of glxinfo
dmesg output
Xorg.0.log

Description florian.a.jung 2010-06-13 10:27:24 UTC 
Created attachment 26749 [details]
output of lspci

After an upgrade to 2.6.34 (2.6.32 also showed that problem) from 2.6.26, 3D stopped working.

glxinfo's output hasn't changed, however glxgears displays a black window, and only sometimes (for example when moving it) i can see flickering gears for a short time.
also other 3D applications are affected

i've a ati radeon mobility m6 LY and i'm using the open source "radeon" driver
it doesn't matter which AGP mode i use, or if i set it to PCI mode.

expected results: working 3d
actual results: black window, flickering gears

I'm using debian lenny and X.Org X Server 1.4.2

steps to reproduce:
  start glxgears.
  enjoy
Comment 1 florian.a.jung 2010-06-13 10:28:16 UTC 
Created attachment 26750 [details]
output of glxinfo
Comment 2 Alex Deucher 2010-06-14 07:15:38 UTC 
Please attach your xorg log and dmesg output.
Comment 3 florian.a.jung 2010-06-14 17:05:41 UTC 
Created attachment 26767 [details]
dmesg output

this is after running glxgears
Comment 4 florian.a.jung 2010-06-14 17:07:04 UTC 
Created attachment 26768 [details]
Xorg.0.log

after running glxgears
Comment 6 florian.a.jung 2010-07-30 13:10:52 UTC 
Thank you, the patch fixed the problem :)