Red Hat Bugzilla – Bug 489062
Awful performance with ati open drivers
Last modified: 2009-12-18 03:58:12 EST
Created attachment 334373 [details]
Description of problem:
My ati video drivers are giving very bad performance comparated with other distributions (ubuntu live-cd)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Turn on the computer
2. Use the desktop for a while
Mouse and keyboard freezing and returning, like if the CPU was topped (and it wasn't). They freeze and back. Connection in ssh shows no problem during this.
Sometimes lockups occurs, and a reboot is necessary
Seems a Xorg or driver issue.
Agile desktop for the hardware (amd X2 4400, 4 GB RAM dual channel, video card ati x600)
Additional info: xorg-x11-xorg-x11-drv-ati.x86_64 version: 6.10.0-2.fc10
Created attachment 334374 [details]
My glxgears results (I know it doesn't count as a benchmark...)
374 frames in 5.0 seconds = 74.653 FPS
925 frames in 5.0 seconds = 184.671 FPS
364 frames in 5.0 seconds = 72.698 FPS
359 frames in 5.0 seconds = 71.771 FPS
189 frames in 7.0 seconds = 26.899 FPS
113 frames in 6.9 seconds = 16.416 FPS
7 frames in 6.0 seconds = 1.160 FPS
4 frames in 6.0 seconds = 0.666 FPS
11 frames in 6.1 seconds = 1.804 FPS
5 frames in 6.0 seconds = 0.829 FPS
6 frames in 6.0 seconds = 0.998 FPS
I can confirm that disabling KMS with nomodeset stops this behaviour. Iam getting normal usage now with this setting.
I'm first time here and I not sure to I write on right place. Today after auto update have problem.
ATI HD3200 graphic card, with enabled compiz and flgrx driver get black screen after restart on Fedora 10. I log in with putty from my laptop and change in xorg conf to load dri radeon driver temporary. I back in xorg.conf to load flgrx works fine without compiz, but unable to start 3D desktop defect.
Do you experience such issue with Fedora beta live cd ?
I don't try fedora live beta. Is not fedora issues. Fedora maybe only can do to check when user do update to not install open source driver if there exists fglrx. Problem is with kernel 2.6.27+ i think. If you want run fglrx on this kernel must first clear open source driver from kernel.
But I back to fedora 10 works perfect.
The kernel in Fedora 12 Beta still has lots of debugging options turned on, which makes KMS slower than usual. At least on my hardware (RS690M) KMS got visibly faster after I recompiled the kernel without debugging. I'm sure these options will be turned off before the final F12 release.
Even with debugging off I can still measure some slowdown in gtkperf when using KMS compared to nomodeset, but it's definitely not "awful" anymore. In normal desktop usage KMS is now quite comfortable.
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