IRQ problems b/n USB and PCI modem... help! (SOLVED)

[Philip Hallstrom]

So, after getting some pointers from folks (thanks!) I started from 
scratch this morning twiddling one BIOS setting at a time.

Turns out that it's *NOT* the USB controller.  Well, maybe it is, I don't 
really know I guess.  By turning off "Power Management" in the BIOS, I can 
access all three modems just fine.

Strange, but I'm glad it's working :)

Thanks all!

On Mon, 18 Apr 2005, Philip Hallstrom wrote:

> Hi all -
> 	I am in IRQ h*ll.  I'm trying to setup an box to use as an inbound 
> modem server...
>
> Here's what's happening...
>
> FreeBSD 4.9
> Dell Dimension XPS T450 (ie. several year old dell).
> Default BIOS settings (switching the PnP OS has no effect).
>
> One NIC recognized as fxp0.  One IDE drive, one cdrom, one floppy.
> Three USR 5610B PCI modems (which work fine individually).
>
> I can access the first two modems via tip, but tipping to the last one locks 
> up the entire system (network, console, everything).  Here's the relevant 
> parts from /var/run/dmesg.boot:
>
> pci1: <3Dfx Voodoo 3 graphics accelerator> at 0.0 irq 11
> ata0: at 0x1f0 irq 14 on atapci0
> ata1: at 0x170 irq 15 on atapci0
> pci0: <Intel 82371AB/EB (PIIX4) USB controller> at 7.2 irq 9
> fxp0: <Intel 82559 Pro/100 Ethernet> port 0x1000-0x103f mem 
> 0xf4000000-0xf40fffff,0xf4100000-0xf4100fff irq 11 at device 13.0 on pci0
> sio0: <3COM PCI FaxModem> port 0x1070-0x1077 irq 10 at device 14.0 on pci0
> sio0: moving to sio4
> sio4: type 16550A
> sio0: <3COM PCI FaxModem> port 0x1078-0x107f irq 7 at device 15.0 on pci0
> sio0: moving to sio5
> sio5: type 16550A
> sio0: <3COM PCI FaxModem> port 0x1080-0x1087 irq 9 at device 16.0 on pci0
> sio0: moving to sio6
> sio6: type 16550A
> fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
> atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
> sio0: type 16550A
>
>
> I am pretty sure my problem is that the USB controller and the third modem 
> are both using IRQ 9, but I can't think of any way to resolve that.
>
> I don't have USB compiled into my kernel and there aren't any settings in the 
> BIOS to shut USB off completely.
>
> I've also tried killing off sio0/IRQ4 in hopes the modem would take that IRQ, 
> but no luck there either.
>
>
>
> Anyone have any ideas on how I can get this to work?  Should I try FreeBSD 
> 5.x?
>
> Thanks all!
>
> -philip
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