Red Hat Bugzilla – Bug 503971
screen corruption, noise on resize (ATI, DVI)
Last modified: 2013-07-28 19:40:51 EDT
Created attachment 346408 [details]
Screenshot of 1600x1200 corruption, incidently including xrandr output
Description of problem:
Resizing the display using gnome-display-properties produces pathological results for several resolutions when using the DVI connection. At 1600x1200, there's a great deal of corruption which is especially visible when windows are dragged, though even initial rendering is messed up. I'm able to capture the results in a screenshot. At 1440x900, there's a noisy, flickering vertical band along the right edge of the screen, but it doesn't show up in a screenshot. None of the other resolutions have any such problems, and the VGA resolutions are all fine. This is a first look at 5.4, and I'm not sure how hardware-specific this problem is, but since the problem is limited to a few resolutions, it's clearly not completely general.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. run gnome-display-properties
2. change resolution to 1600x1200
3. change resolution to 1440x900
corruption (1600x1200), noise (1440x900)
Reasonably sane rendering
ATI FireGL 8800 AGP card
acer X223W monitor
can you see if changing the driver from radeon to r500 in xorg.conf helps?
It does. The noise goes away.
(For the record, the noise is slightly changed in the final radeon driver; the noise I had been seeing at 1440x900 is now also evident at 1600x1200 instead of the corruption previously seen at 1600x1200.)
No further hardware enablement updates are planned for RHEL5's X stack. If this issue remains in RHEL6, please update the affected product version and reopen this bug.