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Date:      Mon, 10 May 1999 12:28:05 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Michael Maxwell <drwho@xnet.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: NIC causes printing problem?
Message-ID:  <19990510122805.Y22791@freebie.lemis.com>
In-Reply-To: <19990509213329.A454@drwho.xnet.com>; from Michael Maxwell on Sun, May 09, 1999 at 09:33:29PM -0500
References:  <19990509213329.A454@drwho.xnet.com>

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On Sunday,  9 May 1999 at 21:33:29 -0500, Michael Maxwell wrote:
> Ok, I have been pulling my hair out over a few things this weekend after
> installing a network card.  The main issue right now is that I cannot print
> when the NIC is installed (in the kernel, that is).
>
> If I boot off an old kernel (pre-network card), printing works fine.  However,
> if I boot off the new kernel, if I submit a print job, it sits in the queue
> and does nothing. I cannot even "lprm" it.  I can manipulate queue status
> through lpc, but that's it.
>
> The only difference between these two kernels is that one has the line:
>  device xl0
> and the other does not.
>
> It doesn't appear to be an IRQ conflict.  As the notes below indicate, the
> NIC is at IRQ 10 on the PCI bus.  The printer/parallel system is on IRQ 7.
>
> Here's the output of "dmesg | grep irq" without the network card enabled:
>
>> dmesg | grep irq
> ahc0: <Adaptec 2940 Ultra SCSI adapter> rev 0x01 int a irq 11 on pci0.12.0
> vga0: <Matrox model 0521 graphics accelerator> rev 0x01 int a irq 11 on pci1.0.0
>  atkbd0 irq 1 on isa
> psm0 irq 12 on isa
> sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
> sio1 at 0x2f8-0x2ff irq 3 on isa
> sio2 at 0x3e8-0x3ef irq 5 on isa
> fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
> ppc0 at 0x378 irq 7 on isa
>
> One thing I find interesting to note about the above is that both the
> display adaptor AND the SCSI adaptor share IRQ 11 (!?!)  I don't know
> how this is possible, but it seems to work without problem. 

The display adaptor doesn't interrupt.

> I have tried changing the IRQ's of these devices through the PCI
> setup on the BIOS.
> No luck.
>
> Here's the /var/log/messages part about the ethernet card:
> May  9 19:53:10 drwho /kernel: xl0: <3Com 3c905B-TX Fast Etherlink XL> rev 0x30 int a irq 15 on pci0.10.0
> May  9 19:53:10 drwho /kernel: xl0: Ethernet address: 00:50:04:1a:20:8c
> May  9 19:53:10 drwho /kernel: xl0: auto

Does the Ethernet board work?  If not, it's possible that its irq is
set to 7.  You should use the 3com setup utility to check.

Greg
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