[Linux-fbdev-devel] Re: Who is stomping PCI config space?

[Benjamin Herrenschmidt]

On Mon, 2005-03-07 at 12:19 +0100, Egbert Eich wrote:
> Benjamin Herrenschmidt writes:
>  > 
>  > > How do we deal with interrupts from VGA cards that we don't have a 
>  > > driver for? 
>  > 
>  > We don't get any, do we ? If we get an interrupt we don't have a driver
>  > for, the system dies usually ;) Well, unless it's an edge interrupt, in
>  > which case we can just drop it on the floor, but PCI interrupts are
>  > level.
> 
> Usually VGA chips are capable of sending interrupts. At least the VGA
> specs had a bit where interrupts can be enabled/disabled.
> I'm surprised that this has not been an issue yet as I'm not sure if
> the BIOS POST always leaves them disabled. For PCI chips they probalbly
> do.

I would be surprised if a BIOS left it enabled ... it would be a really
bad thing to do...