Description of problem: After enabling desktop effects, the screen of 1400x1050 pixels is sort of split up into a region of 1280x800+0+0 and the surrounding area. New windows stretch to the inner boundary at 1280x800 when maximized. They cannnot be resized beyond this limit. A striking effect appears when the desktop cube is rotated. It looks as if certain rectangular parts of the image were missing and the remaining ones glued together at the 1280x800 boundary (see attached screenshot). Eventually, a total lock up of the X server occurs. It's unclear whether the system itself keeps on running or not. Version-Release number of selected component (if applicable): xorg-x11-drv-ati-6.7.195-3.fc8 How reproducible: Always. Steps to Reproduce: 1. Start GNOME session. 2. Enable desktop effects. 3. Rotate desktop cube. Actual results: Parts of the screen seem to be missing along the 1280x800 contour. Expected results: Desktop cube is rotated without any artifacts. Additional info: the output of 'xrandr -q' reads Screen 0: minimum 320 x 200, current 1400 x 1050, maximum 1600 x 1200 VGA-0 connected 1400x1050+0+0 (normal left inverted right x axis y axis) 364mm x 291mm 1600x1200 75.0 59.9 1400x1050@75 75.0* 1280x1024 84.8 73.7 75.0 59.9 1024x768 84.9 75.1 60.0 800x600 84.9 75.0 60.3 640x480 84.6 75.0 60.0 720x400 70.1 None disconnected (normal left inverted right x axis y axis) DVI-0 unknown connection 1280x800+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1360x768 59.8 60.0 1280x800 60.0* 1152x864 60.0 1280x768 60.0 1280x720 60.0 1024x768 60.0 800x600 60.3 640x480 59.9 The secondary device is active although it is disconnected. This should not be the case, should it? After disabling DVI-0 [xrandr --output DVI-0 --off], desktop effects work as expected.
Created attachment 231011 [details] Sample screenshot of artifacts on ATI X800 GT caused by desktop effects
Thanks for the bug report. We have reviewed the information you have provided above, and there is some additional information we require that will be helpful in our diagnosis of this issue. Please attach your X server config file (/etc/X11/xorg.conf) and X server log file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file attachments using the bugzilla file attachment link below. Could you please also try to run without any /etc/X11/xorg.conf whatsoever and let X11 autodetect your display and video card? Attach to this bug /var/log/Xorg.0.log from this attempt as well, please. We will review this issue again once you've had a chance to attach this information. Thanks in advance.
This is the output of 'xrandr -q' for xorg.xonf generated by anaconda: Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1600 x 1200 VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 364mm x 291mm 1600x1200 85.0 75.0 59.9 1280x1024 84.8* 73.7 75.0 59.9 1024x768 84.9 75.1 60.0 800x600 84.9 75.0 60.3 640x480 84.6 75.0 60.0 720x400 70.1 None disconnected (normal left inverted right x axis y axis) DVI-0 unknown connection 1152x864+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1360x768 59.8 60.0 1280x800 60.0 1152x864 60.0* 1280x768 60.0 1280x720 60.0 1024x768 60.0 800x600 60.3 640x480 59.9
Created attachment 232521 [details] xorg.conf created by anaconda
Created attachment 232531 [details] Xorg.0.log from xorg.conf created by anaconda
Created attachment 232601 [details] Xorg.0.log from launching X without xorg.conf
Issue settled in current rawhide.