Re: [gentoo-user] my 5.15.93 kernel keeps rebooting

[Rich Freeman <rich0@gentoo.org>]

On Tue, Feb 14, 2023 at 9:08 AM John Covici <covici@ccs.covici.com> wrote:
>
> Hi.  So, foolish me, I decided to go from a working 5.10.155 system to
> try latest lts of 5.15 which is 5.15.93.  Compile, install went well,
> but the system keeps rebooting.  It gets all the way and even starts
> the local services and then here are the last few lines, which may be
> relevant or not:
>
> Feb 14 06:36:31 ccs.covici.com systemd[1]: Starting local.service...
> Feb 14 06:36:31 ccs.covici.com systemd[1]: Starting
> systemd-update-utmp-runlevel.service...
> Feb 14 06:36:31 ccs.covici.com bash[5753]: rm: cannot remove
> '/etc/ppp/provider_is_up': No such file or directory
> Feb 14 06:36:31 ccs.covici.com systemd[1]:
> systemd-update-utmp-runlevel.service: Deactivated successfully.
> Feb 14 06:36:31 ccs.covici.com systemd[1]: Finished
> systemd-update-utmp-runlevel.service.
> -- Boot 5c394be675854680a9cb616208f374f3 --
>
> Any trouble shooting suggestions as to what is making the system
> reboot?
>

Where are you getting this from, the system log/journal?  This doesn't
seem like a clean shutdown, so if it is a kernel PANIC I wouldn't
expect the most critical info to be in the log (since it will stop
syncing to protect the filesystem).  The details you need probably
will be displayed on the console briefly.  You can also enable a
network console, which will send the dmesg output continuously over
UDP to another device.  This won't be interrupted by a PANIC unless
there is some issue with the hardware or networking stack.

If you can get the final messages on dmesg and the panic core dump
that would help.

The other thing you can do is try to capture a kernel core dump, but
that is a bit more complicated to set up.

Otherwise your log is just going to say that everything was fine until
it wasn't.

-- 
Rich