Description of problem: After several minutes of usage, pressing Alt-Tab to show the window switcher results in garbled output. Screenshots attached after one Alt-Tab, and after pressing Tab a second time. Version-Release number of selected component (if applicable): gnome-shell-2.91.91-1.fc15.x86_64 xorg-x11-drv-nouveau-0.0.16-23.20110303git92db2bc.fc15.x86_64 xorg-x11-server-Xorg-1.10.0-2.fc15.x86_64 Hardware: http://www.smolts.org/client/show/pub_04eb447a-d09f-4dc4-9b4a-3b7dd87db43c How reproducible: Once it happens, always (within the same session). Will update to report if this is reproducible on new sessions Steps to Reproduce: 1. Use desktop as normal 2. Periodically use Alt-Tab to switch between windows Actual results: Corrupted views of window switcher. All other functionality and rendering (Activities view, etc.) unaffected Expected results: Alt-Tab switcher should continue working Additional info:
Created attachment 483519 [details] Photo of displays after Alt-Tab
Created attachment 483520 [details] Photo of displays after a second Tab
After logging out and back in, I can confirm that this is reproducible, and actually happens from the first time Alt-Tab is used. The main window list is garbled, but repeatedly tabbing does switch applications properly, and the view of each application's windows actually display normally (and can be navigated either using the mouse or cursor keys)
Apparently the same problem has also been reported upstream: https://bugzilla.gnome.org/show_bug.cgi?id=644419 Did you encounter this also on single monitor configuration?
I've not tested a single-monitor configuration on the same hardware -- on my laptops, with Intel graphics (as opposed to nVidia on my workstation) this problem does not occur.
OK, just went ahead and tested it -- GNOME shell survived the xrandr operation, which was quite impressive (though I think there's a slow memory leak somewhere). The issue is definitely only on dual-head configurations.
*** Bug 684805 has been marked as a duplicate of this bug. ***
gnome-shell-2.91.91-2.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/gnome-shell-2.91.91-2.fc15
gnome-shell-2.91.91-2.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report.