unexpected IRQ trap at vector a0

[Yaroslav Halchenko <yoh@onerussian.com>]

Dear developers and bug-finders,

I've got a new desktop - some kind of Pentium IV with hyper-threading,
so immediately decided to switch it to 2.6.0-test2-bk8 kernel which was
running on my desktop/laptops for quite a while, but I've got next
problem: when it boots I begin getting my console as well as
syslog/messages flooded with

unexpected IRQ trap at vector a0

(actually first it hanged with PNPBIOS problem - I turned it off)

I modified kernel a bit to don't get all my dmesg filled with only
this error message, so now it is reported only on 1st occurrence (as
well as next string Yarik: APIC is On).

So this error fires up for the first time in the context:

   i2c-piix4 version 2.7.0 (20021208)
   Advanced Linux Sound Architecture Driver Version 0.9.6 (Mon Jul 28
11:08:42 2003 UTC).
   request_module: failed /sbin/modprobe -- snd-card-0. error = -16
   specify port
   specify port
   PCI: Setting latency timer of device 0000:00:1f.5 to 64
unexpected IRQ trap at vector a0
   intel8x0: clocking to 48000
   ALSA device list:
     #0: Intel ICH5 at 0xfebff800, irq 17
   
And later I'm getting also 
IPv6 over IPv4 tunneling driver
irq 9: nobody cared!
Call Trace:
 [<c010b347>] __report_bad_irq+0x2a/0x8b
 [<c010b431>] note_interrupt+0x6f/0x9f
 [<c010b748>] do_IRQ+0x161/0x192
 [<c0109a9c>] common_interrupt+0x18/0x20
 [<c010b2dd>] handle_IRQ_event+0x24/0x64
 [<c010b69f>] do_IRQ+0xb8/0x192
 [<c0105000>] _stext+0x0/0x64
 [<c0109a9c>] common_interrupt+0x18/0x20
 [<c0106e1e>] default_idle+0x0/0x2c
 [<c0105000>] _stext+0x0/0x64
 [<c0106e47>] default_idle+0x29/0x2c
 [<c0106eb7>] cpu_idle+0x3a/0x3c
 [<c045481f>] start_kernel+0x16c/0x183
 [<c045440e>] unknown_bootoption+0x0/0xfd

handlers:
[<c01f807f>] (acpi_irq+0x0/0x16)
Disabling IRQ #9


My logs and kernel configuration (it was patched by
sched-2.6.0-test1-G7, though error existed in pure vanilla kernel as
well - I just already had compiled patched version in my hands already
so decided to proceed with it)

http://www.onerussian.com/acpi.PIV/

I will provide any additional necessary information.

Thank you in advance for your help

                                  .-.
=------------------------------   /v\  ----------------------------=
Keep in touch                    // \\     (yoh@|www.)onerussian.com
Yaroslav Halchenko              /(   )\               ICQ#: 60653192
                   Linux User    ^^-^^    [175555]