Bug#226623: xserver-xfree86: Xvideo broken on Radeon M6 LY
On Wed, 2004-01-07 at 22:54, Alwin Meschede wrote:
> Michel Dänzer wrote:
> >>The Xvideo support for my ATI Mobility Radeon LY seems to be broken in
> >>4.3.0-pre1v5. Instead of the video playback, I only get a blue window.
> >
> > On which head?
>
> Cool. You just pointed me to a workaround for the problem ;-)
>
> If an external CRT is attached at boot time, the notebook automagically
> disables it's internal LCD screen and uses the CRT only. This is the
> setup that doesn't show video.
>
> If I boot up without CRT attached, Xvideo works for the LCD head (and on
> the CRT if it is attached later).
A little background: there is only one video overlay, and it can only be
active on one CRTC at any time. In the former case, the radeon driver
drives the external display with the second CRTC, but it defaults to
assigning the overlay to the first one (but the internal display is
disabled). Option "OverlayOnCRTC2" changes that. In the latter case, the
external display probably rather accidentally shares the first CRTC with
the internal display, which happens to work for you but doesn't work in
general if the displays need different timings.
Hope this clears things up a bit,
PS: Yes, this is very driver/hardware specific. :)
--
Earthling Michel Dänzer | Debian (powerpc), X and DRI developer
Software libre enthusiast | http://svcs.affero.net/rm.php?r=daenzer
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