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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Apr 13 15:28:25 PDT 2012


--- Comment #5 from Alex Deucher <agd5f at yahoo.com> 2012-04-13 15:28:25 PDT ---
(In reply to comment #4)
> forcing DPMS off and on will restore display.  (I have this shell script bound
> to F12 and taping that key will restore the display.)
>     xset dpms force off
>     sleep 1
>     xset dpms force on

Are you getting proper hotplug connect/disconnect interrupts?  The driver does
exactly the same thing on hotplug interrupts.  Assuming the display is active,
on disconnect it calls dpms off, on connect it calls dpms on.  It also sends an
event to userspace so it's possible that may be causing a conflict.  Take a
look at radeon_connector_hotplug() in radeon_connectors.c in the kernel.

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