Intel driver and multiple grapphics cards

[Tino Keitel]

On Tue, Sep 16, 2008 at 13:06:47 +0200, Tino Keitel wrote:
> Hi,
> 
> I want to use the Intel driver together with a graphics card whose
> driver doesn't support RandR 1.2. As far as I can see, the only way
> would be to use Xinerama. And Xinerama isn't a solution because the
> Intel driver crashes the X server as soon as I enable Xinerama (even
> with single head).
> 
> Is there another way to get dualhead to work with this second graphics
> card?

I tried to use VESA for the Intel graphics, which seems to work
regarding the intended Xinerama setup. However, the screen driven by
VESA is broken. It just shows some garbage that is found in memory. If
I pull out the second graphics card, VESA works with the same config
file.

Is VESA supposed to work with Xinerama? If yes, what could I try to
make it work?

Both logfiles can be found here:

http://tikei.de/xorg.log_vesa (working)

http://tikei.de/xorg.log_vesa_dualhead (not working)

I found one possible culprit in the log output:

$ diff -u xorg.log_vesa* | grep -i vesa
...
-(II) VESA(0): virtual address = 0xb731e000,
+(II) VESA(0): virtual address = 0xb7111000,

Could this be the reason for the failure with dualhead? Or is this just
some dynamic address that changes with each reconfiguration?

Regards,
Tino