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SubjectRe: IRQ: Nobody cared (2.6.19.1)
Hi all,

On Sat, 6 Jan 2007, Chris Wilson wrote:

> Forwarded to lkml as suggested by Alan Stern. Please copy any replies to me,
> as I'm not on the list (too much traffic, sorry!).

Ping? It's been two weeks.

Cheers, Chris.

> On Fri, 5 Jan 2007, Alan Stern wrote:
>> On Sat, 6 Jan 2007, Chris Wilson wrote:
>> >
>> > I keep getting the following errors:
>> >
>> > Jan 5 23:48:38 gcc kernel: irq 10: nobody cared (try booting with the
>> > "irqpoll" option)
>>
>> > Jan 5 23:48:38 gcc kernel: handlers:
>>
>> > Jan 5 23:48:38 gcc kernel: [<e0866a00>] (usb_hcd_irq+0x0/0x70
>> > [usbcore])
>> > Jan 5 23:48:38 gcc kernel: Disabling IRQ #10
>> >
>> > There are no devices attached to that USB port, and it's the only device
>> > registered for IRQ 10.
>> >
>> > This is a 2.6.19.1 kernel, last booted less than an hour ago. I had the
>> > same problem with 2.6.14.3 and older kernels, but less frequently.
>> >
>> > Hardware is dual p3 coppermine, Gigabyte 6VXDC7 motherboard. Otherwise
>> > very stable, last up for 297 days (until I booted this kernel).
>>
>> > /proc/interrupts:
>> >
>> > CPU0 CPU1
>> > 0: 424892 412866 IO-APIC-edge timer
>> > 1: 2706 2034 IO-APIC-edge i8042
>> > 4: 5 1 IO-APIC-edge serial
>> > 5: 0 0 IO-APIC-fasteoi acpi
>> > 6: 5 0 IO-APIC-edge floppy
>> > 7: 0 0 IO-APIC-edge parport0
>> > 10: 75964 63749 IO-APIC-fasteoi uhci_hcd:usb1,
>> > uhci_hcd:usb2
>> > 12: 38217 29601 IO-APIC-edge i8042
>> > 14: 24424 14372 IO-APIC-edge ide0
>> > 15: 1 10 IO-APIC-edge ide1
>> > 16: 44129 1 IO-APIC-fasteoi eth0
>> > 17: 35 209490 IO-APIC-fasteoi eth1
>> > 18: 49348 50382 IO-APIC-fasteoi EMU10K1
>> > NMI: 0 0
>> > LOC: 837636 837635
>> > ERR: 0
>> > MIS: 0
>> >
>> > Please let me know if I can provide any more information that might
>> > help,
>> > or anything I can do to help fix this. I expect that the USB port is now
>> > useless until I reload the module.
>>
>> This almost certainly is not caused by a problem in the USB hardware.
>> More likely some other device is using IRQ 10 and the kernel doesn't
>> realize it. In other words, it's a problem in IRQ assignment.
>>
>> You can try booting with acpi=off on the boot command line, or acpi=noirq,
>> or noapic.
>>
>> You can go ahead and report this on LKML; you don't have to subscribe to
>> the list in order to post on it. (That's what I do.) Include the dmesg
>> log showing the IRQ assignments during boot-up.
>>
>> Alan Stern
>
> Dmesg boot log attached. Any suggestions gratefully received.
>
> It seems a bit drastic to disable a whole IRQ if it receives spurious
> interrupts that are not claimed by any driver. That could kill a machine if
> the IRQ is used for something critical like disks.
>
> I'd rather not boot without ACPI if possible, as I don't want to lose power
> saving. I'm not sure about the negative consequences of booting with
> acpi=noirq or noapic, so I haven't tried that yet.
>
> Cheers, Chris.
--
_ ___ __ _
/ __/ / ,__(_)_ | Chris Wilson <0000 at qwirx.com> - Cambs UK |
/ (_/ ,\/ _/ /_ \ | Security/C/C++/Java/Perl/SQL/HTML Developer |
\ _/_/_/_//_/___/ | We are GNU-free your mind-and your software |

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