video playback on quad head system

[Alex Deucher]

On 2/20/06, Erwin Rol <mailinglists at erwinrol.com> wrote:
> Hey all,
>
> I am trying to playback video on a quad head system, and it works, but i
> have some strange effects. I have 4 monitors, 1,2,3 and 4, they are all
> connected to a Ati FireMV 2400 PCI that has two M9 chips. Monitor 1 and
> 2 are connected to the first chip , monitor 3 and 4 to the second chip.
>
> If i now start a mplayer and move it from monitor 1 to 4,  i get a black
> picture as soon as the windows is partly on monitor 1 and 2, or if it is
> partly on monitor 3 and 4. I do have a picture when it is partly on
> monitor 2 and 3.  Now i am wondering since monitor 1&2 are just one big
> frame buffer, why is the picture black when it is not fully on one
> monitor ?
>
> Dis i miss some configuration option ?
>
> Any info is welcome.

each radeon chip only has one video overlay that can be sourced to
either crtc1 or crtc2.  So in your situation, you can only get video
on 2 heads at any one time ((1 or 2) and (3 or 4)).

Alex

>
> TIA,
>
> Erwin
>