GNOME Bugzilla – Bug 360147
Windows in windowlist appear and dissapear unexpected using AIGLX
Last modified: 2018-01-24 13:37:08 UTC
Please describe the problem: When changing workspaces (with that AIGLX 3D effect) then windows from first workspace appear in next workspace and when 3D animation is ended then windows dissapear very ugly from window list. Steps to reproduce: 1. Take Mandriva 2007 Live CD with Gnome and choose to run with AIGLX. 2. Open some windows. 3. Change workspace and see what happens with window list. Actual results: Just the windows (on window list) appear and dissapear not expected and it looks not nice. Expected results: ... Does this happen every time? Yes, yes. Other information: I guess it's not about my hardware, but i'm using IBM R50 with ATI videocard.
I don't have 3D acceleration, so I can't test and I don't understand the problem you're describing. Can you take some screenshots or a screencast?
Created attachment 82764 [details] Where windows should and shouldn't appear...
Actually it doesn't seem like a real bug, it's only connected to AiGLX and 3D desktops and that little unexpected behavior also appears with KDE and Xfce. The thing is that window list shows the windows of current desktop, but with 3D desktop You can see window lists of other desktops at the same time (on that 3d cube) but these window lists are just like the active desktop one (actually there are no windows, but the window list is still full on active desktop's windows). After the 3D motion (when chancing desktops) when the other desktop gets active, the windows from window list suddenly disappear. In simple words window list is not able to show itself with different windows at the same time, but with 3D desktop You see window lists of different desktops at the same time. Also attaching a picture ;)
Ah, you're using compiz, yes? compiz only recently gained support for workspace hints, so I'd be tempted to mark this as a compiz bug. But, perhaps there's a feature request here in handling of viewports? Maybe this is handled in one of those compiz patches for libwnck?
I believe the problem here is that there's only one active workspace at a time, and the tasklist only shows what's on the active workspace. The tasklist on the second workspace you're seeing can't do anything to show what you would expect. I don't know if this is fixable...
Compiz should cache the panels of a workspace when leaving it and show them on the different sides of the cube when rotating. So IMHO it's a compiz bug. Maybe someone can create a bug report in the new bugzilla at opencompositing.org?
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