While this bug don't happen very often to me, it behaves exactly as described.
Some clarifications: -It is not linked to Nvidia graphics, but happens on Intel too. -It is definetely about graphical window depth order. The "hidden" applications can be focused and work as expected. They even change the mouse cursor according to their actions. They are just obscured by the nautlilus or nemo desktop. -If nautilus or nemo is killed, all other applications reappear, until nautlilus or nemo is run again, in which case they are obscured again. This can be repeated reliable after the bug once triggered. -If metacity is restarted, the bug is gone until it is triggered again by unknown reason. Trigger is likely the apperance of a new window (I had the bug triggered on the failing appearance of some delete verification request dialog). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/1538111 Title: untraceable serious bug in metacity 3.18 Status in metacity package in Ubuntu: In Progress Bug description: Ubuntu 16.04 LTS uses 3.18 version of gnome metacity. When doing lots of mess work in Desktop (such as open desktop window, sudo window, dragging window, and so on), "!! WHEN CLICKING CLOSE BUTTON OF A CERTAIN WINDOW !!", there is "small possibility" for metacity to get out of work --> Many windows are disappeared, with only nautilus desktop background and gnome-panel on screen. "Live Window List" still exists in gnome-panel, but no matter doing what (such as open new application from gnome-menu or use Alt+Tab to switch window), none of live windows can be displayed. So the only way is to switch to tty1 using Ctrl+Alt+F1, and executing "DISPLAY=:0 metacity -c --replace", then all windows came back. Till now, I meet this bug every day, but still not sure how to reproduce it bug. I think you should trace what the metacity do when clicking "close button" that makes all windows to be disappeared. Thanks. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: metacity 1:3.18.1-1ubuntu3 ProcVersionSignature: Ubuntu 4.3.0-7.18-generic 4.3.3 Uname: Linux 4.3.0-7-generic x86_64 ApportVersion: 2.19.3-0ubuntu3 Architecture: amd64 CurrentDesktop: GNOME-Flashback:Unity Date: Tue Jan 26 19:49:48 2016 SourcePackage: metacity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
