https://bugs.freedesktop.org/show_bug.cgi?id=110659

--- Comment #63 from Michel Dänzer michel@daenzer.net --- Can you find out which property is getting set? If there's no (easy) way to get that out of the kernel, one possibility is to (from another machine via SSH) attach gdb to the Xorg process while an affected app is running, set breakpoints in drmModeConnectorSetProperty and drmModeObjectSetProperty, and get backtraces of where they're getting called from.