Bug 683932

Summary: GNOME Shell Alt-tab switcher window list view is corrupted
Product: [Fedora] Fedora Reporter: Michel Lind <michel>
Component: gnome-shellAssignee: Owen Taylor <otaylor>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: unspecified    
Version: 15CC: maxamillion, mikey, otaylor, samkraju, vhumpa, walters
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: gnome-shell-2.91.91-2.fc15 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-03-18 03:53:37 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
Photo of displays after Alt-Tab
none
Photo of displays after a second Tab none

Description Michel Lind 2011-03-10 17:29:29 UTC 
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:
Comment 1 Michel Lind 2011-03-10 17:31:13 UTC 
Created attachment 483519 [details]
Photo of displays after Alt-Tab
Comment 2 Michel Lind 2011-03-10 17:31:40 UTC 
Created attachment 483520 [details]
Photo of displays after a second Tab
Comment 3 Michel Lind 2011-03-10 17:50:19 UTC 
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)
Comment 4 Vitezslav Humpa 2011-03-15 14:59:29 UTC 
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?
Comment 5 Michel Lind 2011-03-16 17:18:49 UTC 
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.
Comment 6 Michel Lind 2011-03-16 17:21:52 UTC 
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.
Comment 7 Michel Lind 2011-03-16 19:07:39 UTC 
*** Bug 684805 has been marked as a duplicate of this bug. ***
Comment 8 Fedora Update System 2011-03-16 19:39:27 UTC 
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
Comment 9 Fedora Update System 2011-03-18 03:53:33 UTC 
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.