Red Hat Bugzilla – Bug 961130
Xorg freeze with upgrade to any Linux 3.8 kernel - ATI RS780
Last modified: 2013-07-02 11:09:10 EDT
Description of problem:
Desktop will periodically freeze from 15 to 120 seconds. During freeze, system is running normally, i.e. I can ssh in from another host. No errors have been found that correspond to these events. I've checked Xorg.0.log, messages, etc.
The import aspect is that this happens with every 3.8.x kernel up to 3.8.11-200.fc18.x86_64. If I down-rev to 3.7.9, the problem goes away.
I have three other desktops machines I manage, two of which are different ATI video chip sets. I'm guessing this is xorg driver and hardware specific.
Display uses radeon driver. Card is:
01:05.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RS780M/RS780MN [Mobility Radeon HD 3200 Graphics]
I've watched /proc/interrupts during one of these events. Radeon interrupts drop from 10s per second to 1 or 2 per second.
I am running with Desktop Effect enabled. If I drop the 'Animation speed' to slow, that seems to help. Hard to say for sure since it's semi-random.
Version-Release number of selected component (if applicable):
All 3.8 kernels up to at least 3.8.11-200.fc18.x86_64.
Start an Xorg session and do some work. Frequency is maybe 3-10 events per hour depending on how intensive the display tasks are (read: working only in a terminal, it seems to happen less).
I've replicated the problem both with and without an /etc/X11/xorg.conf in place.
Steps to Reproduce:
Can not reproduce at will.
Created attachment 745455 [details]
I'm seeing the same behavoir on 3.9.2-200.fc18.x86_64.
I'm testing with 'nosmp' kernel boot option today on 3.9.2-200 to see if that helps.
No dice. Locked up with SMP disabled.
I'm beginning to think this may be a thermal issue. I dusted out the main heat sync; top end temp was >203F, now is about 190F. I'm still seeing freezes, however, they're much shorter in duration, 1-2 seconds.
Maybe something about 3.8/3.9 pushes the graphics hardware a little harder/hotter.
Since no one else is reporting an issue, I'll assume this is local to me.
Feel free to resolve.
Closing out per comment #5. If you're still seeing hangs and you start seeing errors associated with them, please open a new bug with the relevant information. Thank you.