[plug] Video card IRQs

[Christian]

On Wed, Jun 13, 2001 at 01:08:42PM +0800, Brad Campbell wrote:
> Christian wrote:
> > 
> > On Tue, Jun 12, 2001 at 09:00:35PM +0800, Craig Foster wrote:
> > > Check your CMOS (usually near Advanced or PCI configuration) for an option
> > > to set whether or not video gets an IRQ. Also remember that most
> > > mainboards share IRQs on AGP and PCI Slot 1. No they don't need one, but
> > > without them - it's coffee time...
> > 
> > Uh-huh, and I don't drink coffee so you can see why it's frustrating. :)
> > 
> > The CMOS has an option that says "Assign IRQ for VGA" but the only two
> > selections are "Auto" and "Disable".  Either way, it doesn't assign an
> > IRQ. :(  Any ideas?
> >
> 
> I know this is an obvious question, but when you say it doesn't assign an
> IRQ, is that from the bios screen or /proc/interrupts ?

Not /proc/interrupts.  I've never seen a video card IRQ listed in there.
But under /proc/pci it is normally listed (on other systems).

When the machine boots and the BIOS lists devices and IRQs and specifies
"N/A" for the video card and /proc/pci says:

  Bus  1, device   0, function  0:
    VGA compatible controller: S3 Inc. Unknown device (rev 1).
      Vendor id=5333. Device id=8904.
      Medium devsel.  Master Capable.  Latency=64.  Min Gnt=4.Max
Lat=255.
      Non-prefetchable 32 bit memory at 0xe0000000 [0xe0000000].

While on the other machine it says:
  Bus  0, device  16, function  0:
    VGA compatible controller: Tseng'Lab ET6000 (rev 48).
      Slow devsel.  IRQ 11.  
      Non-prefetchable 32 bit memory at 0xfb000000 [0xfb000000].
      I/O at 0xfc00 [0xfc01].



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