[Bug 66820] Re: nobody cares about via interrupt

Jacob Nevins 0jacobnk.ulp at chiark.greenend.org.uk
Tue May 15 22:18:01 UTC 2007

I ran into this error message and problem straight after installing
Dapper. "irqpoll" didn't help me either (the machine hung hard instead).

I notice that your /proc/interrupts has a suspiciously round number. I
found that when an interrupt packed in (for me it was usually USB or
sound, with concomitant symptoms), the interrupt count displayed in
/proc/interrupts was *always* a multiple of 100000 (and sometimes
implausibly large). For instance, see IRQs 11 and 185:

$ cat /proc/interrupts
  0:    2455783    IO-APIC-edge  timer
  1:       3979    IO-APIC-edge  i8042
  7:          0    IO-APIC-edge  parport0
  8:          3    IO-APIC-edge  rtc
  9:          1   IO-APIC-level  acpi
 11:     200000   IO-APIC-level  uhci_hcd:usb1, uhci_hcd:usb2
 12:      78674    IO-APIC-edge  i8042
 14:      15828    IO-APIC-edge  ide0
 15:     266079    IO-APIC-edge  ide1
169:    1080436   IO-APIC-level  nvidia
177:        146   IO-APIC-level  eth0
185:     600000   IO-APIC-level  Ensoniq AudioPCI
NMI:          0
LOC:    2455610
ERR:          0
MIS:          0

For me, the workaround is to add "noapic nolapic" to my kernel command
line. (May be a sledgehammer to crack a nut, but it works. I got it from
Wikipedia, of all places.)

The motherboard is an MSI K7T Turbo2. (I can post lspci type spew if
anyone's interested.)

Hope this info helps somebody. This was very frustrating until I found
the workaround.

nobody cares about via interrupt
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