After a bit of testing, I found out that the DQ45EK does not disable the integrated video or set the integrated video as a secondary device when there is a PCI-express video card present. Changing the BIOS settings makes has no effect.
(--) PCI: (0:0:2:0) 8086:2e12:8086:1004 Intel Corporation 4 Series Chipset Integrated Graphics Controller rev 3, Mem @ 0xd3400000/4194304, 0xb0000000/268435456, I/O @ 0x0000e220/8 (--) PCI: (0:2:0:0) 10de:0640:196e:0643 nVidia Corporation G96 [GeForce 9500 GT] rev 161, Mem @ 0xd2000000/16777216, 0xc0000000/268435456, 0xd0000000/33554432, I/O @ 0x0000d000/128, BIOS @ 0x????????/524288
By default there is no video output in Karmic. In fact, X does not start. I was able to get video out of my GeForce card to work in Kubuntu Karmic, but it was in multihead mode and I was not able to disable the integrated x4500 adapter.
I tried to downgrade my BIOS version to see if it was a new bug, but it failed when trying to flash the management firmware. I guess downgrades are not allowed on this board. The recovery method also did nothing. Nothing showed up on the screen.
Intel, is there a beta BIOS available that I may try? Is there a fix coming out soon? This bug makes it impossible to use a graphical bootloader, and you only get video on the PCI-e adapter once the O.S. loads up. And that's only if one can figure out how to setup a secondary adapter. I have yet to see how this bug affects Windows.