Raspberry Pi 400 won't power down

[Łukasz Remiś]

The computer won't power down. Shutting down process stops at: Reached target: Power-off
After waiting a while some messages/errors are being displayed. Screenshot attached. I have to disconnect power cable.

Reboot works properly.

I'm using Ubuntu Mate 20.10, on Raspberry Pi 400. Everything updated.
Linux pi-desktop 5.8.0-1010-raspi #13-Ubuntu

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1909799/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mads (mad3)]

After updating to 5.8.0-1013-raspi, my rpi400 now turns off. But it wont turn on again! I have to reinsert the power to power it back on...

And I think the power led's behaviour has changed too, now it's a pure HDD activity led instead of a power led.