IRQ clash problems with 2.2.14 and 2.3.33?

[James Fidell]

Quoting Jeff Noxon (jeff en planetfall.com):

> ISA cards cannot share interrupts with other devices.  I don't know why it
> would work under Windows.

I think the ACPI issue is a red herring.  I didn't realise it was enabled
when I built the kernel and was surprised when I found it trying to share
an IRQ with the network card.  It's not enabled any more, but the card
still doesn't work :(

> What does /proc/interrupts look like?

I'm retyping this from the screen, since I can't get onto it over the
network.  I've checked for errors and don't see any, but you know how it
is...

With 2.2.14, I get:

  0: XT-PIC  timer
  1: XT-PIC  keyboard
  2: XT-PIC  cascade
  7: XT-PIC  soundblaster
  9: XT-PIC  eth0
 10: XT-PIC  aic7xxx
 11: XT-PIC  bttv
 12: XT-PIC  PS/2 mouse
 13: XT-PIC  fpu
 14: XT-PIC  ide0


2.3.33 gives me:

  0: XT-PIC  timer
  1: XT-PIC  keyboard
  2: XT-PIC  cascade
  7: XT-PIC  soundblaster
  9: XT-PIC  eth0
 10: XT-PIC  aic7xxx
 11: XT-PIC  uhci, bttv
 12: XT-PIC  PS/2 mouse
 13: XT-PIC  fpu
 14: XT-PIC  ide0

As far as I can ascertain, under Win98, I have:

 0 timer
 1 keyboard
 2 interrupt controller
 3 COM2
 4 COM1
 5 Maxtrox G200 and Hollywood Plus MP3 decoder
 6 Floppy controller
 7 Soundblaster 16
 8 Clock
 9 3c509
10 AHA2940
11 WinTV and PCI/USB controller
12 Mouse
13 FPU
14 Primary IDE Controller
15 Secondary IDE Controller

I see arp requests from the machine on the network, and I see responses from
the remote systems to those requests.  Clearly the kernel doesn't see them
though, and the IRQ count as displayed in /proc/interrupts never gets
above zero.

I'm building 2.3.39 as I type, but I don't hold out a whole lot of
hope for anything different.  After that I'm going to start pulling boards
out until the card starts working again, but I don't think that's going to
help me understand the problem much, nor to fix it.  If it didn't all
work under win98, I'd assume there was a hardware problem of some sort and
indeed that could still be the case.  I just don't know how to move forward
with this now.

James.
-- 
 "Yield to temptation --             | Consultancy: james en cloud9.co.uk 
  it may not pass your way again"    | http://www.cloud9.co.uk/james
                                     |
        - Lazarus Long               |              James Fidell

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