It's hard to reproduce "at will". I personally run Firefox, Thunderbird, Chrome, gedit, gjiten, skype, pidgin, Gnome Terminal, and always have something like 20 windows open at a time on my main workspace.
Of note : - When alt tabbing between windows, sometimes surfaces flash to black for one instant before redraw happens. This might indicate that the core problem with metacity crashing in the first place is linked to Xorg or the nvidia driver ? - Also, with previous versions of Ubuntu, I did have metacity crash on me at times, but the session would keep on running, so I could relaunch metacity from an open terminal (or via console using : DISPLAY=:0.0 metacity ) ; The crash itself is not a problem, gnome-sessions's extremely poor handling of it is. The easiest way for me to produce this crash is to edit text in gedit, open a PDF in evince, and spend my time alt tabbing between them (which happens quite a lot as I am doing translation work). At one point, I'll start seeing redrawing artifacts (to explain : even though I switched applications, the display still shows a black surface, or the application which was on top of gedit at that time, and I have to interact with the application for redraw to occur. When I see this symptom, I know that within the next 50~100 window switchings, I will crash. The crash can even be triggered by clicking the window tab on the application bar. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1507764 Title: metacity crashed with signal 5 in _XEventsQueued() ; forcing gnome session to logout To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1507764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs