IO-APIC, beaten with stick, routes USB
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Any chance you can try Alan Cox's patch against 2.4.5? It has a number of IO-APIC fixes.
patch-2.4.5-ac7.bz2 behaves the same as 2.4.4. Whatever is happening in IO-APIC setup, USB interrupts actually arrive on IRQ 12. I can include the usual pile of config info and boot messages, but they look the same as previous l-k postings.
Since IRQ 12 is a popular destination for USB, the following patch may work for people with this problem:
usb-ohci.c.rico renamed from usb-ohci.c +1 -1
@@ -2524,3 +2524,3 @@ - return hc_found_ohci (dev, dev->irq, mem_base, id); + return hc_found_ohci (dev, 12, mem_base, id); }
If 12 fails, they can look for the stray interrupt in /proc/stat.