Yep, have exactly same issue. As I suspected from point 0, this is the gnome-settings daemon crash (rather hang more correctly).
To 'fix' the problem temporarily I did: # the SIGKILL is importaint, because the program seems to be hung completely and ignores SIGTERM killall -9 gnome-settings-daemon gnome-settings-daemon. #At that point panel looks ok, but nautilus not, so #Then restart nautilus as it seems not to pick the change killall nautilus I bet that this is a race condition just happened to be exposed by slow virtual CPU. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/728803 Title: Ubuntu theme switches from partially broken to gnome default on VirtualBox guest -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
