Same happens to me... Though, at random point of time after booting up... It never
happened during the boot sequence.
I installed Slackware 10.2 on my Dell d610. I previously have had Debian working fine,
and Slackware 10.1 and FreeBSD, all of them were running more or less fine... except
for some mis-configs that were, most of time, my newbieness
Hardware is: Pentium M/512MB/HD/CDRW+DVD/Intel i915GM
all primary, since no need for extended...
I installed Slack just yesterday... with 2.4 kernel.. I will probably have to switch to 2.6
to get some decent transfer rates out of my HD... I wanted to do it yesterday but didn't
have time, so machine was booted and sitting there on login prompt for the whole day,
but as soon as I logged in 10 secs later ... when I was editing sudoers file ... there it was...
Couple more times after that...