Public bug reported: This is the second time that I encounter this bug in Xubuntu 16.04.3 LTS with current kernel 4.4.0-116-generic x86_64.
Two applications were running: Firefox and LibreOffice 6.1. I could not start any other application using the xfce4-panel, not even the whisker menu. However, after pointing with the mouse to one the buttons on the panel, after a short while its explanation was shown to me. Switching between the running programs the Alt-Tab-way worked. Since I could neither switch to another screen nor to the other running application nor shut down orderly via the panel way, I opened a terminal by a right click on the desktop and started a terminal there. In this terminal I issued the command xfce4-terminaal --restart. Then the buttons on the xfce4-panel worked again. I could switch between the running applications and between different desktops. However the system reacted strange: When I shifted windows on my screen, they left a trace. I terminated the two running applications by their own terminate buttons. I suspected that the system was in some strange state and therefore I issued shutdown -r to get out orderly. ** Affects: xfce4 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802634 Title: xfce4 panel items don't react but show their functions on mouse over To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4/+bug/1802634/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs