[SOLVED] System freezes, disabling IRQ channel in Slackware 13
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If this is a PCI NIC, move it to another slot. If it's onboard, you'll have to use the bios to reroute the IRQ numbers. There are options you can pass to the kernel from Lilo, but I'd try moving the NIC to another slot first.
--edit hit submit too soon--
You can try passing noacpi or pci=noapci. Check for a bios update as well.
Last edited by disturbed1; 11-03-2009 at 10:30 AM.
The short of it -
IRQ sharing causes more than one device to be allocated the same resources. It is hit or miss if it works. Sometimes devices are happy sharing, other times they're like spoiled little kids. The motherboards BIOS maps resources out according to PCI slots. Usually AGP/PCIe is shared with PCI slot 1, slot2 and slot3 are shared, slot4 and slot5 are shared. Honestly, there is no rule of thumb, and varies manufacturer to manufacturer as far as the IRQ routing goes, the above seems to be pretty common though.
Keep an eye on this, especially if the same NIC has always been in the same PCI slot. If this crops up again, it's possibly another problem altogether. Though this too can vary, most likely it boils down to failing NIC, or bad driver. Next time your at the computer store, or make a purchase online, pick a spare NIC. It's always nice to have one handy.