As far as I read there is no way to disable a PCI slot, so the solution is to force the use of the correct slot.
Check in your /var/log/Xorg.0.conf, you should find a line like this (this is from another computer, so the chip type will be different):
(II) Nov 24 09:47:43 NVIDIA(0): NVIDIA GPU GeForce 8400M GS (G86M) at PCI:1:0:0 (GPU-0)
indicating that the nvidia driver found an nvidia chip at the given pci slot. If yes, I suppose the asterisk above doesn't mean anything relevant to our problem...
As far as I read there is no way to disable a PCI slot, so the solution is to force the use of the correct slot. Xorg.0. conf, you should find a line like this (this is from another computer, so the chip type will be different):
Check in your /var/log/
(II) Nov 24 09:47:43 NVIDIA(0): NVIDIA GPU GeForce 8400M GS (G86M) at PCI:1:0:0 (GPU-0)
indicating that the nvidia driver found an nvidia chip at the given pci slot. If yes, I suppose the asterisk above doesn't mean anything relevant to our problem...