[Bug 2597] New: Dual Head broken on Intel 845G chipset and Nvidia GeForce4 MX 4000

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https://bugs.freedesktop.org/show_bug.cgi?id=2597          
     
           Summary: Dual Head broken on Intel 845G chipset and Nvidia
                    GeForce4 MX 4000
           Product: xorg
           Version: 6.8.1
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Server/general
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: tahoward at nc.rr.com


I'm trying to get X working with 2 video cards - the builtin graphics (Intel
845G chipset) using the i810 driver, and a pci Nvidia GeForce4 MX 4000 using the
Nvidia 6629 driver.  I'm using kernel 2.6.10, X.org 6.8.1.  When I boot the
machine, the BIOS has an option to select whether the primary graphics should be
AGP or PCI. When I set it to AGP, I can start X on the Intel graphics, but when
I try the Nvidia, the X server crashes.  When I set the primary graphics
device to PCI, X will start on the Nvidia card, but I get these errors
when I try to start it on the Intel:

(EE) I810(0): Cannot read V_BIOS
(EE) I810(0): VBE initialization failed.

I've tried running both X servers separately, and together - same
results.  I've also tried the NoInt10 option for the i810 driver, but it
still won't start.  I think X is always querying the BIOS for
information about the video card, and the BIOS returns info for whatever
card is set as the primary, regardless of which one X is set to use.
Here are the config files I'm using:

X only on i810:
http://home.nc.rr.com/webstorage/xorg.conf.intel
X only on nvidia:
http://home.nc.rr.com/webstorage/xorg.conf.nvidia.monitor
X on both:
http://home.nc.rr.com/webstorage/xorg.conf.multihead

Here are the logs from when I try to start the X server:
X on i810, bios set to AGP, works:
http://home.nc.rr.com/webstorage/Xorg.0.log.i810oni810b
X on i810, bios set to PCI, X won't start:
http://home.nc.rr.com/webstorage/Xorg.0.log.i810onnvb
X on nvidia, bios set to AGP, X crashes:
http://home.nc.rr.com/webstorage/Xorg.0.log.nvoni810b
X on nvidia, bios set to PCI, works:
http://home.nc.rr.com/webstorage/Xorg.0.log.nvonnvb

I also tried the vesa driver, but it says that it can't find a device
matching the device id I put in the config file.          
     
     
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