Comment 9 for bug 468413

My problem still exists. Reloading radeon module worked fine untill I powered down machine. Then I had my X server using 100% of CPU and black screen.

I have tried with EXA and XAA acceleration modes, both with similar results. It seems to me that I can get accelerated X only when my desktop first starts in non-accelerated mode and then I reload radeon module and start X again.
But even then when I try to play some 3D games (e.g chromium), then I see artifacts on the screen (eg. red and white vertical stripes) during reboot (restoring text mode), so accelerated modes still have problems.

When I use Cyril's method during startup X hangs with 100% CPU usage. Maybe graphic card is initialized in some way when it probes different screen modes in non-agp mode (reloading modules before gdm start prevents that probing in non-accelerated mode).

Unfortunately I can't do more tests at ths time. I have had to return to my previous, non-accelerated mode because my wife use that computer for TV watching ;) Maybe I find some time during weekend to test it again in more digested way. If you have any suggestions how to test, please post it here or send me by email.