Description of problem:
After upgrading the ATI driver from 6.6.3-4.fc8 to 6.7.191-1.fc8, the X
server aborts upon start-up, and the monitor goes to power off mode.

Version-Release number of selected component (if applicable):
xorg-x11-drv-ati-6.7.191-1.fc8

How reproducible:
Always.

Steps to Reproduce:
1. Install xorg-x11-drv-ati-6.7.191-1.fc8 package.
2. Restart X server.
  
Actual results:
Monitor powers off.

Expected results:
X starts and graphical login panel appears.

Additional info:
- At this point, it's not possible to switch to a virtual console anymore.
  However, entering ctrl-alt-del still allows to reboot the system.
- Downgrading to xorg-x11-drv-ati-6.6.3-4.fc8 allows to recover a working
  X environment.
- All later driver versions including 6.7.194 exhibit this malfunction.
- Xorg.0.log contains a backtrace related to the crash [see attachment].
- Adding option 'NoDRI' to the driver section of xorg.conf doesn't change
  anything either.
- The monitor device is an HP A4576A 21" CRT for which a single mode
  '1400x1050' has been added to xorg.conf [otherwise, default resolution
  would be '1600x1200' which is too high]. The graphics card is an ATI
  AIW Radeon 7200 [R100 QD].