[Nouveau] [Bug 20878] New: Xorg server does not properly autodetect dual nVidia graphics cards

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20878

           Summary: Xorg server does not properly autodetect dual nVidia
                    graphics cards
           Product: xorg
           Version: 7.4
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Server/general
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: sgallagh at redhat.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=24273)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=24273)
X.org log demonstrating the error

When starting the X server, it detects that there are "More than one possible
primary device found"

(!!) More than one possible primary device found
(--) PCI: (0 at 3:0:0) nVidia Corporation G94 [GeForce 9600 GT] rev 161, Mem @
0xf4000000/16777216, 0xc0000000/268435456, 0xf2000000/33554432, I/O @
0x0000ac00/128, BIOS @ 0x????????/524288
(--) PCI: (0 at 5:0:0) nVidia Corporation G94 [GeForce 9600 GT] rev 161, Mem @
0xf8000000/16777216, 0xd0000000/268435456, 0xf6000000/33554432, I/O @
0x00008c00/128, BIOS @ 0x????????/524288


The X server will then attempt to invoke the VESA driver instead of the Nouveau
driver (this is on the Fedora 11 Nouveau Test Day LiveCD)

Ultimately it will fail with:
Fatal server error:
AddScreen/ScreenInit failed for driver 0


However, if I manually add the following to an xorg.conf file, it loads
correctly.
Section "Device"
        Identifier  "Videocard0"
        BusID       "PCI:3:0:0"
        Driver      "nouveau"
EndSection

Section "Device"
        Identifier      "Videocard1"
        BusID           "PCI:5:0:0"
        Driver          "nouveau"
EndSection


The correct behavior of the X server should be to automatically generate these
entries for each card.


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