This usually is your screensaver failing to activate after an idle timeout.
It was mentioned on the other forum a few times already. Not sure whether it's a Qubes bug, probably more a xrandr bug which affects the security of Qubes users. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/24f730e4-4635-40ef-3312-cf25a641c7c1%40hackingthe.net.
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