On Thu, 24 Dec 1998, Mitch Marantz wrote:
> I've just installed an Asus P5A-B Super 7 motherboard (Ali Aladdin V
> AGPset chipset). Everything works except for my modem. The new board
> seems to be generating an IRQ conflict.
>
> At first I booted up with my regular 2.0.33 kernel, and got the
> following error message on bootup:
>
> pcibios_init : BIOS32 Service Directory structure at 0x000f9b80
> pcibios_init : BIOS32 Service Directory entry at 0xf0530
> pcibios_init : PCI BIOS revision 2.10 entry at 0xf0560
> Probing PCI hardware.
> Warning : Unknown PCI device (10b9:1541). Please read include/linux/pci.h
> Warning : Unknown PCI device (10b9:5243). Please read include/linux/pci.h
> Warning : Unknown PCI device (10b9:7101). Please read include/linux/pci.h
> Warning : Unknown PCI device (10b9:1533). Please read include/linux/pci.h
> Warning : Unknown PCI device (10b9:5229). Please read include/linux/pci.h
> Calibrating delay loop.. ok - 663.55 BogoMIPS
>
> I next tried 2.0.36, which seemed to recognize the board.
>
> pcibios_init : BIOS32 Service Directory structure at 0x000f9b80
> pcibios_init : BIOS32 Service Directory entry at 0xf0530
> pcibios_init : PCI BIOS revision 2.10 entry at 0xf0560
> Probing PCI hardware.
> Calibrating delay loop.. ok - 663.55 BogoMIPS
>
> However, my modem (which I would set to IRQ 9 at bootup using setserial in
> my etc/rc.d/rc.local file) was hanging up when I tried to use it, and
> proc/interrupts was showing I now had a conflict on IRQ 9. IRQ 9 was the
> only free IRQ before the new motherboard, and now it seems to be gone,
> whether I'm using 2.0.33 or 2.0.36.
On most (all?) motherboards, IRQ9 is the same as IRQ2, so it probably
isn't really free.
Frank
>
> How can I free up an IRQ?
>
> Thanks.
>
>
>
