ubuntu - Unknown modprobe causing high load average

For about the last 6 months, and for about a year before
that (with a 6 month hiatus), one of my servers has had a consistently high load
average:

13:37:34
up 192 days, 5:44, 2 users, load average: 2.00, 2.01,
2.00

Per href="https://serverfault.com/a/139256/42461">another answer, I checked the
output of ps:

$ ps -eo
            stat,pid,user,command | egrep "^STAT|^D|^R"
STAT PID USER
            COMMAND

D< 3043 root /sbin/modprobe -Q
            pci:v00008086d0000293Esv000015D9sd0000D780bc04sc03i00
D< 3150 root
            /sbin/modprobe -Qba
            pnp:dPNP0401

Checking
the config & loaded modules:

$
            modprobe -c | grep "pnp:dPNP0401"
alias pnp:dPNP0401*
            parport_pc

$ sudo modprobe -l | grep
            parport_pc

/lib/modules/2.6.24-29-server/kernel/drivers/parport/parport_pc.ko

So
it appears to be a parallel port rule, but I can't think of what might be connected, or
why. Physical access to the server is about 2 hours drive
away.

Operating system is Ubuntu
8.04.4.

I can't see anything obvious anywhere in
/etc/ but I may not know what I'm looking
for.

Any clues as to what might be causing this,
and where this modprobe rule may have come from?

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