I open this thread to know if somebody else with a dual GFX card setup encounters the same problem with full-screen Warp3D.
On my X1000, I have 2 gfx cards plugged on the same monitor (DVI and VGA).
Radeon9250 that I use for Warp3D (VGA)
Radeon HD6670 (I don't use Wazp3D) (DVI)
On the 9250, when I launch Warp3D games like Hurrican or SuperTuxKart :
Window mode = OK
Fullscreen mode = KO
the game display goes on the HD6670 who doesn't support Warp3D => failed (I see this by switching my monitor to DVI and seeing a freezed distorted picture)
On the HD6670, when I launch WarpView (who open his own screen)
The display switch to the Radeon 9250 on VGA.
It's strange, but, at least, it works.
When I start theses programs, I don't have a ScreenRequester asking for the ScreenMode that I wish.
I have tried NewMode promotion tool, but I don't succeed to make it working (I'm sure that it's the user the problem

To conclude, is somebody with a dual GFX setup encounters the same problem ?
Or is it me who have missed a parameter ?
Thank you for your help.