[plug] Segmentation fault

[Carl Gherardi]

On Sun, 26 Aug 2001, Clinton Butler wrote:

> Peter Wright wrote:
>
> > On Sun, Aug 26, 2001 at 12:10:01PM +0800, Clinton Butler wrote:
> > > This morning we had a power failure and my Debian box was on... it was
> > > then turned off by lack of power. The system now refuses to run 'lilo'
> > > (as I have just switched the kernel back to 2.2.19_pre17 seeing as it was
> > > nice) and comes up with "Segmentation fualt" and puts me back to the prompt.
> >
> > Um. Let me see if I've got this straight:
> >
> > 1. Before power failure you were running a Debian Linux box with <unspecified>
> > kernel which seemed to be mostly working okay?
> >
>
> <unspecified> = recompiled 2.2.19 (compiled by me and I realised I didn't need
> what I put in there.. and it was buggy)
>
> >
> > 2. You had a power failure and thus your system went down without a proper
> > shutdown.
> >
> > 3. When you rebooted you went through the usual exciting process of
> > watching with great interest as your disk partition(s) got fscked to make
> > sure they're okay.
> >
> > 4. You finished booting, logged in and your system seemed okay, until...
> >
>
> bingo
>
> >
> > 5. ...you decided to go back to using the 2.2.19_pre17 kernel instead of
> > the <unspecified> kernel you were using previously.
>
> see 1
>
> >
> >
> > 6. You went through <unspecified> steps to switch back to 2.2.19_pre17 (which
> > I presume included modifying /etc/lilo.conf), then you tried to run
> > /sbin/lilo (which reads /etc/lilo.conf and updates the boot block) and you
> > got a segmentation fault.
>
> bingo. I just changed the default boot kernel

When recompiling the kernel it is possible that you
overwrote/replaced/removed all the existing modules for the kernel.

(Please correct if im wrong here guys)

When you do a make install you created a directory /lib/modules/<kernel#>/

If you recomplied a kernel with the same number then you probably would
have replaced at least some of these files, so when you switch back to
the original kernel things aren't quite the same as when they were
installed.(attempts to be more vague...)

Did you make a backup of the original modules directory?

Carl