After the recent update by FreeBSD maintainers to VirtualBox version 5.1.x, fbpanel, lxpanel, xfce4-panel and possibly others have problems with right-clicking their task manager buttons after a virtual machine is started from the VirtualBox Manager. Previous versions of VirtualBox (4.x.x and 5.0.x) did not have this problem. How to reproduce this issue: - - - - * Start VirtualBox Manager * Double-click virtual machine to start it * After virtual machine starts, right-click on the virtual machine's task manager button in fbpanel, lxpanel or xfce4-panel and the context menu does not pop up. * Normal click another task bar button, then right-clicking works temporarily * Exit (all) virtual machine(s) * Right-clicking of task manager buttons works again in fbpanel, lxpanel and xfce4-panel. - - - - This problem does not seem to happen when only the VirtualBox Manager is running. VirtualBox version: 5.1.6 r110634 - (Qt5.6.1) FreeBSD 10.3 - 64-bit uname -a: FreeBSD will-freebsd 10.3-RELEASE-p7 FreeBSD 10.3-RELEASE-p7 #0: Thu Aug 11 18:38:15 UTC 2016 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
Additional information: I am running Fluxbox as my window manager, however I also tried this with xfce4-wm and the problem still exists.
Filed a bug report upstream: https://www.virtualbox.org/ticket/16046
We have version 5.2.4. Does the problem still exists or is this is overcome by events.