@Tomodachi - if you note, the bug refers to the nouveau driver, not the binary one - with the nouveau driver it fails to successfully boot UNLESS acceleration is disabled - ie. it only boot successfully if you add:
nouveau.noaccel=1
to the kernel command line
The second issue is then that Xorg may pick to use the wrong card (ie the one which the display is not connected to - but this can be controlled by either disabling say the 9600 card as you do, or by specifying which card to use via its PCI device id in the device section of xorg.conf with something like:
@Tomodachi - if you note, the bug refers to the nouveau driver, not the binary one - with the nouveau driver it fails to successfully boot UNLESS acceleration is disabled - ie. it only boot successfully if you add:
nouveau.noaccel=1
to the kernel command line
The second issue is then that Xorg may pick to use the wrong card (ie the one which the display is not connected to - but this can be controlled by either disabling say the 9600 card as you do, or by specifying which card to use via its PCI device id in the device section of xorg.conf with something like:
BusID "PCI:3:0:0" # this selects the 9400M