[Bug 46711] Monitor not turning on after DisplayPort re-plug in Xorg

https://bugs.freedesktop.org/show_bug.cgi?id=46711

--- Comment #15 from Tvrtko Ursulin tvrtko.ursulin@onelan.co.uk 2012-04-18 01:16:19 PDT --- In fact, with the patch monitor is no longer in power save mode after cable re-plug (whereas without the patch it would be), but in some strange state where the screen is black and it seems to be thoroughly confused to the extend it can't even show the OSD. At this point if I run "xset dpms force off" I properly goes into powersave and OSD works again.

I suspect DP initialization done from radeon_connector_hotplug is somehow incomplete or buggy.