Don't PCI graphics cards run out of their own driver in the card's ROM? I guess there could be a bug in some base OF word in Rev A that messes up the card's OF driver though.
With a Radeon 7000 installed, two weird things are happening:
- With a monitor connected just to the Rage Pro, after the desktop loads the system will crash with a green screen or no display.
- If one monitor is connected (either to the onboard graphics, or the R7000) it will not show the happy Mac or the early stages of the boot process. It’s behaving as if the primary monitor is the secondary, whichever graphics card it’s connected to.
None of this occurs with the Rev C ROM.