Reboot on ssh command locks up device, how to solve?

[Colin Law]

On Tue, 17 May 2022, 09:41 Bo Berglund, <bo.berglund at gmail.com> wrote:

> I have an HP Prodesk computer where I have installed Linuxmint 20.03
> (based on
> Ubuntu).
> It sits on a remote location and I usually only access it via SSH (PuTTY
> or VNC
> from Windows).
>
> Unlike a couple of other devices, both HP laptops running Ubuntu 20.04.4
> LTS,
> when I issue the command:
> sudo reboot
> on this device it seems *not* to cleanly do a reboot (the ssh session is
> not
> exited but just locks up).
>


Have a look at /var/log/syslog to see if it gives any clues about what is
going on.

Also check that the bios/firmware is up to date.

Colin




> Instead the computer gets into an inaccessible state which lasts forever.
> When I first discovered this I could do nothing for a month until I could
> travel
> to the remote location. And there I had to power cycle the computer.
>
> But then I installed a ShellyPlug device in the power feed to the computer
> as a
> last resort thing to power cycle it remotely.
>
> Today I had to reboot since the system had been up for 51 days and after a
> sudo
> apt full-upgrade I needed the reboot.
>
> And again it hung!
>
> So this time I could use the ShellyPlug device to power cycle the system,
> whereupon it did a full start.
>
> But now I want to get to the bottom of this!
> It seems like issuing the command "sudo reboot" just partly works, I lose
> SSH
> connection immediately but the reboot seems not to be performed anyway.
>
> Is there some command that will *really* FORCE a reboot to happen?
>
> I have seen the "reboot -f" command to force the reboot, but I have not
> yet used
> it.
> If it does work mabe I could add it as an alias, but how do I create
> aliases for
> sudo?
>
> And how can I find out what was actually happening when it didn't reboot?
>
>
> --
> Bo Berglund
> Developer in Sweden
>
>
> --
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