[Bug 38030] DPMS suspend fails to turn off monitor with my Radeon HD5750

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jun 7 13:14:08 PDT 2011


--- Comment #13 from Alex Deucher <agd5f at yahoo.com> 2011-06-07 13:14:07 PDT ---
(In reply to comment #10)
> (Turns out that without an xorg.conf, the xserver will only try
> xserver-xorg-video-ati, even if you have the radeon driver installed.)

xf86-video-ati is the radeon driver.  It doesn't matter whether you specify
radeon or ati as the driver name.

Check to make sure the monitor cable is properly seated.  Does the monitor go
off/on at regular intervals?  It sounds like perhaps the monitor is gets woken
up due to a temporary signal on the port.  I'll bet some process is polling the
monitors at some set interval.  Usually it's upowerd or the kde equivalent. 
Does killing upowerd fix the issue?  Those daemons shouldn't be polling the the
connectors.  The kernel will provide events if a monitor is connected.

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