This varies with the machine but when I change back I find on my older desktop I have to unplug the video card to re-enable the onboard video.
I'm having problems with my graphics card and would like to switch to the internal GPU. I disconnected the D-Sub video cable from the graphics card port and connected it to the motherboard's external D-Sub port, but when I turned on the computer, there was no video. I reconnected the cable to the graphics card port and entered the BIOS. I changed Init Display First from Auto to IGFX and Internal Graphics from Auto to Enabled. I was about to Save & Exit, but I suddenly became concerned that if I was making a mistake, I could end up with no video at all, and no way to see the BIOS and change things back again.
Here are my questions:
1) When I first disconnected the D-Sub video cable from the graphics card port and connected it to the MB's external D-Sub port, given that the two settings mentioned above were set to Auto, shouldn't I have received video from the onboard GPU chip?
2) Will changing the two BIOS settings as discussed above do the trick?
3) If something goes wrong and I end up with no video from either the internal video chip or from the graphics card, will I have any way of setting things right again?