I noticed recently that shutting down my Linux (Ubuntu 20.04) desktop does not power it down once everything has come to a halt. It states
Power down but the led is still glowing and the fan is still moving etc. which it shouldn't!
The result is a terminal stating as showin in the picture:
I assumed something might be configured wrong in the BIOS but when I tried with Windows (I'm sorry!) it worked as usual so the problem seems to come from the linux side.
Of course I searched and tried other solutions like: Shutdown does not power off. Why?
However neither the KDE shutdown option nor the terminal call seem to work.
Another thing I tried was
but the answer seems outdated and does not work (anymore?). So even with the option
GRUB_CMDLINE_LINUX_DEFAULT="noplymouth intel_iommu=on acpi=force apm=power_off"
nothing happens (tried
apm=power_off separately, too) and the computer still stays powered-on after shutting down.
One hint might be the output of
acpi -V -i
No support for device type: power_supply
So is this the problem? Is there a way of configuring acpi correctly? Or did I miss something else?