0 Replies Latest reply on Mar 14, 2013 6:50 AM by G.Gandhi

    how integrated graphics automatically disables after inserting discrete card


      Hi, when a pci graphics card is inserted, the onboard/integrated graphics is normally disabled by BIOS automatically. I have observed that the device subclass of the integrated graphics controller is changed from 00(0h) i.e VGA compatible to 80(0h) i.e. Other display controller. Since this is a read only field in the PCI configuration space, how is it done?