I have what may be a clue.
I'm having the same problem, and I noticed this in dmesg:
[17179641.976000] wifi0: Atheros 5212: mem=0xe8900000, irq=193
[17179642.364000] ACPI: PCI interrupt for device 0000:00:0b.0 disabled
[17179642.364000] ath_pci: driver unloaded
[17179642.368000] ath_rate_sample: unloaded
[17179642.372000] ath_hal: driver unloaded
Notice irq=193. Ok, here's the contents of my /proc/interrupts:
CPU0
0: 42657 IO-APIC-edge timer
7: 0 IO-APIC-edge parport0
8: 3 IO-APIC-edge rtc
9: 1 IO-APIC-level acpi
14: 3200 IO-APIC-edge ide0
15: 106 IO-APIC-edge ide1
177: 96 IO-APIC-level ohci_hcd:usb1
185: 0 IO-APIC-level ohci_hcd:usb2
193: 395 IO-APIC-level eth1
201: 1190 IO-APIC-level ohci1394, eth0
NMI: 0
LOC: 42395
ERR: 0
MIS: 14
So, it seems that 193 is taken by eth1 (I have two wired network cards
in this box, and one pci wireless AR5212 card.)
I tried getting into the BIOS and re-setting the ECSD, but that didn't
change anything. I also tried changing the IRQ's around in the BIOS
setting, but of course the BIOS doesn't know anything about irq #193, so
I can't reserve it.
I will try and remove that nic, but it will be tricky as the box is
headless, and that's my way in without wifi ;-)
--
madwifi unloads immediately inserting module
https://launchpad.net/bugs/71635
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