Description of problem:
For the current "rawhide" tree, enabling KMS results in a black screen during the boot procedure and in powering the monitor off. The graphics device is an ATI Radeon X800 attached to a 21" CRT HP A4576A.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot system while making sure that KMS is enabled.
Screen turns black and powers off a moment later.
At least progress bar animation is visible as in the "nomodeset" case.
Regression occurred within a week or so.
Once the boot procedure has been completed, X actually starts up as expected.
Can you attach, as plain text, the contents of /var/log/dmesg after booting the problem kernel?
Created attachment 360039 [details]
dmesg output for kernel 2.6.31-0.204.rc9.fc12.x86_64
can we get a boot with drm.debug=0xf?
I think the wierd sync thing is confusing something.
Fixed In Version: kernel-2.6.31-0.212.rc9.git1.fc12.x86_64
However, issue has returned slightly altered as bug 526433 .