Bug 20945 - Kernel Panic on exit X11 and constantly degrade in performance radeon 6.12.1 with xorg-server-1.5.3 & linux-2.6.28+
Summary: Kernel Panic on exit X11 and constantly degrade in performance radeon 6.12.1 ...
Status: RESOLVED NOTOURBUG
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/Radeon (show other bugs)
Version: 7.4 (2008.09)
Hardware: All Linux (All)
: medium critical
Assignee: xf86-video-ati maintainers
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-03-30 04:37 UTC by Oliver Maurhart
Modified: 2009-03-30 05:40 UTC (History)
0 users

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Description Oliver Maurhart 2009-03-30 04:37:24 UTC 
I'm running a Gentoo System with an 
* ATI Mobility X600
* KDE4.2.1
* xorg-server-1.5.3-r5
* xf86-video-ati-6.12.1

Since kernel 2.6.28-gentoo-r3, 2.6.28-gentoo-r4 and 2.6.29-gentoo I'm experiencing Kernel Panic on x11-exit. For short it says something like this:

vblank_disable_fn
vblank_disable_fn
run_timer_softirq
__do_softirq
...

And then all LEDs on my Laptop are blinking ... (is there a chance to get the output electronically?)

Since I experienced a slow degrade of performance in KDE (see https://bugs.kde.org/show_bug.cgi?id=186839) I assume the xf86-video-ati to be some sort broken on my installation. I sense the Xorg-Server constantly consuming more and more CPU over a period of 6 hours (starting at aroung 6% up to 25%) and the system's performance (KDE's and Konsole's performance respectively) constantly going down to unusability and finally giving me a Kernel Panic at xorg exit.

What can I do?
Comment 1 Michel Dänzer 2009-03-30 04:47:19 UTC 
A kernel panic is by definition a kernel bug. You should probably take this up with the Gentoo kernel maintainers (e.g. in case they patched the drm/radeon kernel modules).

As for the X server performance degrading over time, that's probably unrelated. If you're using EXA, it could be due to EXA offscreen memory fragmentation. If VT switching to console and back to X restores performance, that's probably it, and you could try my defragmentation patch (latest iteration posted at http://lists.x.org/archives/xorg-devel/2009-March/000489.html).
Comment 2 Oliver Maurhart 2009-03-30 05:40:22 UTC 
Hm, ok, I filed https://bugs.gentoo.org/show_bug.cgi?id=264280

.. and yes, I was using EXA indeed. I'll try XNA again. At first glance switching to console and back to X11 didn't impove anything. But this is a mere subjective feeling by now.

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