Hi F_B did you find a solution here?

I have the same issue with an Optiplex 990 and Opensuse.
Problem seems to be ACPI related.
normal settings in grub: Reboot hangs - machine stands still; shutdown
does poweroff
grub with acpi=off: Reboot works, shutdown does poweroff

But i wouldn't really disable the whole acpi..

F_B;2124017 Wrote:
> I just forgot, shutting down the system works fine

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