No composite on 2nd screen (:1)

[Thomas Börkel]

HI!

I have DRI and composite working on the first screen (:0). When I start
another session (:1), I have no composite there and I get this error in
Xorg.1.log:

(II) [drm] DRM interface version 1.0
(EE) [drm] Could not set DRM device bus ID.
(EE) RADEON(0): [dri] DRIScreenInit failed.  Disabling DRI.

When I configure kdmrc to have 2 static X servers :0 and :1 from the
beginning, then both do not have composite and log that error.

My system:
- Gentoo
- kernel 2.6.27
- xorg-server 1.5.3
- xf86-video-ati 6.10.0
- KDE 4.2
- RV350 [Mobility Radeon 9600 M10]

Is that something that I can fix or workaround or is it just a known
limitation of the driver?

Thanks!

Thomas