[Hardy] with radeon only picture when using VNC, screen itself stays black

[menedas]

I'm having here a Radeon 9100 IGP which I want to run with the radeon driver which is provided by Hardy. But currently I only get a picture when I login to that computer over VNC, the connected screen itself stays black with a blinking cursor. I can only get a picture on the screen when using the vesa mode.

I have tried with no success the following options in the Device Section:
Option "MonitorLayout" "TMDS, CRT"
Option "MonitorLayout" "CRT, TMDS"
Option "CloneDisplay" "force on"
Option "DefaultTMDSPLL" "on"

I'm supposing that it could be solved with the right settings in the xorg.conf, but Hardy didn't set it automatically.