2001-02-16 12:22:16

by Udo A. Steinberg

[permalink] [raw]
Subject: Spurious interrupts


Hi all,

After modifying some bios settings and assigning the parallel port
IRQ5 instead of the IRQ7 it formerly had, I'm now getting kernel
messages like this:

spurious 8259A interrupt: IRQ7

IRQ7 is not in use by any device, but interrupts occur.

Can someone tell me what's up with that?

-Udo.

--

/proc/interrupts:

CPU0
0: 34556 XT-PIC timer
1: 934 XT-PIC keyboard
2: 0 XT-PIC cascade
3: 1340 XT-PIC serial
5: 1 XT-PIC parport0
8: 1 XT-PIC rtc
9: 308 XT-PIC eth0, bttv
10: 65134 XT-PIC ide0
11: 0 XT-PIC EMU10K1
12: 3126 XT-PIC PS/2 Mouse
14: 5 XT-PIC ide2
NMI: 0
LOC: 34523
ERR: 9

procinfo:

Linux 2.4.1-ac15 (root@Corona) (gcc 2.95.2 19991024 ) #1 Fri Feb 16 08:36:50 CET 2001 1CPU

Memory: Total Used Free Shared Buffers Cached
Mem: 255552 252180 3372 0 100704 84888
Swap: 524152 1436 522716

Bootup: Fri Feb 16 13:14:08 2001 Load average: 1.11 0.90 0.42 2/71 246

user : 0:00:16.57 4.4% page in : 432579
nice : 0:03:28.11 55.0% page out: 3564
system: 0:00:18.43 4.9% swap in : 816
idle : 0:02:15.58 35.8% swap out: 1381
uptime: 0:06:18.68 context : 187481

irq 0: 37869 timer irq 8: 1 rtc
irq 1: 1141 keyboard irq 9: 335 eth0, bttv
irq 2: 0 cascade [4] irq 10: 65145 ide0
irq 3: 1550 serial irq 11: 0 EMU10K1
irq 5: 1 parport0 [3] irq 12: 4248 PS/2 Mouse
irq 6: 2 irq 14: 5 ide2
irq 7: 10