A possible cause is bug 805303, which should be fixed.
Can you run the following commands in a terminal window:
pkill -f hp-systray LIBOVERLAY_SCROLLBAR=0 hp-systray
Does hp-systray stay stable now?
Does your desktop stay stable when you are running vlc?
A possible cause is bug 805303, which should be fixed.
Can you run the following commands in a terminal window:
pkill -f hp-systray SCROLLBAR= 0 hp-systray
LIBOVERLAY_
Does hp-systray stay stable now?
Does your desktop stay stable when you are running vlc?