The picture shows a running but "disappearing" gnome-terminal application,
and the "popul menu" is from clicking the "Search (S)" item from gnome- terminal, which is disappeared. In this moment, I am unable to use "Alt+Tab" to switch out any window except the desktop background and gnome-panel. -- I have to goto tty1, and run: killall metacity; DISPLAY=:0 metacity to recover all window session. ** Attachment added: "VirtualBox_Ubuntu_26_01_2016_20_11_34.png" https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1557904/+attachment/4600989/+files/VirtualBox_Ubuntu_26_01_2016_20_11_34.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1557904 Title: 3 bugs from metacity 3.18.2 (for Ubuntu 16.04 xenial) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1557904/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs