https://bugzilla.kernel.org/show_bug.cgi?id=117171
--- Comment #3 from Erik Brangs erik.brangs@gmx.de --- The problem might be related to DPMS: I haven't seen any freezes after deactivating DPMS in xscreensaver.
When I use DPMS with "Standby" in xscreensaver and set the times for "Suspend" and "Off" to a high value so that they won't be triggered, the problem still occurs.