Problems with NIC

Jaimie Garner jaimie at
Wed Apr 13 11:25:58 PDT 2005

How about disable USB altogether since it is not used on this machine. Thanks 
for the info
On Wednesday 13 April 2005 16:15, Roland Smith wrote:
> On Wed, Apr 13, 2005 at 05:50:27AM +0000, Jaimie Garner wrote:
> > This just started happing this evening not sure what is up.  The nic
> > is a Linksys LNE 100 V 4.something I forget now.  I had some weird
> > errors a while back when I first installed 5.3-RELEASE but i disabled
> > ACPI and they seemed to work fine.
> >
> > Here is some info
> > dc0: <ADMtek AN985 10/100BaseTX> port 0x1000-0x10ff mem
> > 0xfc001000-0xfc0013ff irq 9 at device 12.0 on pci0on pci0
> > miibus0: <MII bus> on dc0i0
> > ukphy0: <Generic IEEE 802.3u media interface> on miibus0
> > ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> > dc0: Ethernet address: 00:03:6d:16:09:1e
> > dc0: if_start running deferred for Giant
> > dc0: [GIANT-LOCKED]
> >
> > This looks odd especaly this:
> >  Interrupt storm detected on "irq9: dc0 ohci0"; throttling interrupt
> > source
> Looks like the USB bus (ohci0) and your network card are sharing an
> interrupt line. My guess would be that a USB device generates too much
> interrupts causing the kernel to throttle them. This then screws up the
> network.
> According to polling(4), the dc driver supports polling instead of using
> an interrupt line. You could try rebuilding the kernel with polling
> support and see if the problem goes away.
> Or you could disable ohci0 in the bios, or plug the offending USB device
> into another port.
> Or you could try to force the dc triver to use another interrupt
> line. See the acpi manual page and google for 'irq routing freebsd'. I
> _think_ you should do the following: 'ps -xa|grep irq' will show which
> irq's are free. Let's say that irq 10 is still free. Now you'd have to
> find the pci address of the network card with 'pciconf -l -v|grep dc0'.
> Let's say you get something like 'dc0 at pci0:11:0' You can now tune the
> interrupt by setting the following in /boot/device.hints:
> HTH,
> Roland

Jaimie Garner
Onsite PCS inc.
323 SE RIverside AV
Grants Pass, OR 97526
jaimie at

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