Need help debugging shutdown issues

[Nikolaus Rath]

Nikolaus Rath <Nikolaus-BTH8mxji4b0 at public.gmane.org> writes:
> Ok, this probably sounds weird, but I confirmed it several times:
>
> - when I run "systemctl reboot/poweroff" on a console, it works
> - when I run "systemctl reboot/poweroff" on an X11 terminal, it
>   hangs
>
> Additionally, when running "systemctl reboot" from X11 the system
> becomes unusable after a fraction of a second - the screen goes blank
> and I can't switch to a text console anymore either. I have tried to
> issue the command and then quickly switch, but this did not work either.
>
> When I'm running "systemctl reboot" from a console, the system stays
> usable. I can see the status messages, switch to other consoles and use
> the debug shell. But this doesn't help much, because the system shuts
> down just fine.

I confirmed this in a slightly different way by running "systemctl
reboot" in an ssh session established from a different system.

If the system where systemctl is executed has a text console active, the
reboot works. If the system has X11 console active, the reboot hangs and
the system becomes unusable (I can't even switch to a text console).

Any suggestions?

Thanks,
-Nikolaus

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