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

[Mike Tancsa]

On Mon, 18 Apr 2005 14:24:28 -0700 (PDT), in
sentex.lists.freebsd.questions you 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.

This sounds like a number of bugs we have run into.  Perhaps moving
the serial card to being a PUC device like with did with the Smartlink
modem in the PR below
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/74786

Also, if you do ever use the USB bus, there are a number of bug fixes
you will need, especially with uhid.

>
>Anyone have any ideas on how I can get this to work?  Should I try FreeBSD 
>5.x?


If its the problem we are running into, no it will still be there
under RELENG_5.  However, in general RELENG_5 is much more stable,
especially if you cannot turn off USB in the BIOS.

	---Mike
--------------------------------------------------------
Mike Tancsa, Sentex communications http://www.sentex.net
Providing Internet Access since 1994
mike at sentex.net, (http://www.tancsa.com)