[ltp] dual head ati 7500 t41

[Alex Deucher]

On Thu, 16 Dec 2004 22:54:09 +0000, alejo <alejo@cohete.net> wrote:
> hi all, i ve been copy pasting xorg confs from here and there and
> finally i got a dualhead working on the radeon 7500.
> 
> i have a wierd behaviour though..
> 
> glxgears create the window with the 3 sprockets but this image is only
> seen or rendered when inside my laptop screen; when i drag it to the
> second monitor, the CRT, it appears just as a black square box withouth
> the rendered color sprockets?
> 
> why this? could anyone give me and idea.
> is it related to a incompatibility between xinerama and xorg?
> 

Hw accelerated 3d only works in singel head mode or in mergedfb
dualhead mode.  if you are using "xinerama" style dualhead then you
won't get HW accel.

Alex