[expert] pci device irq conflicts how do you avoid them?

stuart simpson Sun, 01 Apr 2001 22:07:58 -0700

ok in windows, you goto the control panel and change the irq's if there is a conflict. Since there doesn't seem to be a similar way to do this in mandrake, what configuration files do I change? Can I change this with configuration files?

using mandrake 8.0 beta 1

my apparent problem:

according to: cat /proc/pci

my sndblaster live uses irq 10

my matrox g400 uses irq 11

when I install mandrake, I can't get the hpt 366 on board udma "card" ( on motherboard )

to work -- computer crashes upon bootup. It also uses Irq 11

so I turned off the hpt 366 card in the bios temporarily, and then installed mandrake, worked ok

then I was hoping to be able to enable the hpt 366 in the kernel 2.4.2 in order for it to work. ( i assumed this was the reason for the crashing )

I went to check the kernel settings, and hpt 366 in the newer kernel is enabled by default, and it is shown as detected in the bootup, but after detection, it crashes.

so I am assuming the fact that the video card (agp) uses irq 11, and the hpt channels use irq 11 ( 2 of them ) is the conflict that crashes my computer upon booting.

what I'd like to do:

move snd card to irq 5

move video card to irq 10

then the hpt366 can work ok on irq 11

or simply move the hpt 366 to irq 5?

------------------------------------------------------------

my motherboard is the abit be6-2 with the hpt366 controller. I upgraded it to the latest bios, from february 2001.

in my bios, the o/s is set to non-plug n play, as I understand that its supposed to be.

----------------------------

if I

1) disable irq 11 in system bios

2) disable the u-dma controller in system bios

3) re-install linux ( so hopefully nothing would touch irq 11 )

3) then re-enable the u-dma controller

would the u-dma controller then have irq 11 to itself?

If I did this would it affect how windows operates? ( multi-boot machine )

or is there an easier way?

ie edit some text file?

if so which one?

---------------------------------------------------------------------------------------------------------------------------------------

help!!!

-------------------

cat /proc/pci

PCI devices found:
Bus 0, device   0, function 0:
    Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge
(rev 3).
      Master Capable. Latency=248.
      Prefetchable 32 bit memory at 0xd0000000 [0xd3ffffff].
Bus 0, device   1, function 0:
    PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev
3).
      Master Capable. Latency=64. Min Gnt=136.
Bus 0, device   7, function 0:
    ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 2).
Bus 0, device   7, function 1:
    IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 1).
      Master Capable. Latency=240.
      I/O at 0xf000 [0xf00f].
Bus 0, device   7, function 2:
    USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 1).
      IRQ 10.
      Master Capable. Latency=240.
      I/O at 0xe000 [0xe01f].
Bus 0, device   7, function 3:
    Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 2).
      IRQ 9.
Bus 0, device 11, function 0:
    Multimedia audio controller: Creative Labs SB Live! EMU10000 (rev
6).
      IRQ 10.
      Master Capable. Latency=248. Min Gnt=2.Max Lat=20.
      I/O at 0xe400 [0xe41f].
Bus 0, device 11, function 1:
    Input device controller: Creative Labs SB Live! (rev 6).
      Master Capable. Latency=248.
      I/O at 0xe800 [0xe807].
Bus 1, device   0, function 0:
    VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev
4).
      IRQ 11.
      Master Capable. Latency=248. Min Gnt=16.Max Lat=32.
      Prefetchable 32 bit memory at 0xd8000000 [0xd9ffffff].
      Non-prefetchable 32 bit memory at 0xd4000000 [0xd4003fff].
      Non-prefetchable 32 bit memory at 0xd5000000 [0xd57fffff].

[expert] pci device irq conflicts how do you avoid them?

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