On Fri, 2007-08-31 at 15:14 -0400, Tom Sylla wrote:
> [...]
> Later on, an OS can go do its own PCI scan, assign real BARs to the
> non-primary VGA cards (or the BIOS may have done so), and run drivers
> that can talk to them.

There is still one thing that all that does not explain, however. Once
all cards have IO decoding turned on (`lspci -vv' on my machine clearly
shows that all my three video cards decode IO), how comes only one card
actually decodes VGA IO?

I can start X servers on my two non-boot VGA cards, all while still
having the VGA text console still working on my boot-time VGA card.
There must be some way to explain it other than just turning IO decode
on and off.

Fredrik Tolf


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