Dual Head make the computer hang with FC5t3

[Eric Hartmann]

Hi,

I have troubles with dual head with a hp nc6000 laptop (radeon video card).
I've just upgraded fom FC4 to FC5T3 and then rawhide and every time I
plug a monitor on the laptop and restart the X server, the computer hang
with a blank screen and the monitor did not receive any signal.

Do someone have the same trouble ?
If someone have any work around, I will be happy to try it.

-eric