high CPU activity for interrupts

[guru at Sisis.de]

Hello,

>From time to time I see an increasing temperature of the CPU of
my laptop and figured out that this has to do with a high load
of the CPU for 'interrupts' while the system itself is nearly
unused (only KDE with a few windows are up):

top(1) shows it like this:

CPU states:  0.8% user,  0.0% nice,  0.4% system, 22.9% interrupt, 76.0% idle

What could I do to figure out what's going on?

BTW: Some times ago I've asked for a small desktop gadget for showing
the CPU temperature; I wrote it like this:

$ xterm -geometry 8x1 -e '/home/guru/termal.sh'
$ cat termal.sh 
#!/bin/sh
#
while true; do
    clear
    printf "%s %s " `sysctl -a | fgrep tempe | sed 's/^.*: //'`
    sleep 15
done

I set the window properties to not having borders and it stays
there relaunched all the time by KDE again (you may see it here:
http://www.sisis.de/~guru/temp.jpg to get the idea).

	matthias

-- 
Matthias Apitz / Sisis Informationssysteme GmbH
Gruenwalder Weg 28g / D-82041 Oberhaching
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http://www.sisis.de/