Comment 8 for bug 1364748

ACPI spec defines _ROM as "This method is used to get a copy of the display devices’ ROM data". In this case, it is used to get VBIOS (ex. VGA's configuration) from ACPI BIOS AML code. As it fails, OS is not able to get such configuration information.

I tried nvidia-prime and switched between nvidia and intel VGA, and the switching did happen according to its system indicator, but I am running glmark2 in both VGA modes in order to see whether the switching is indeed occurred.