NO standby or shutdown possible (5.13.0.27)

[Anton Lettenbichler]

I am using Xubuntu (actual LTS-version) with AMD-Ryzen
with Kernel: 5.13.0.27 there is no regular powerdwn or Standby possible:
The system does not switch off with: "tl@tl-as:~$ shutdown now -h" too;
If I boot with the last version in the boot options (5.11.0.46) I can use Standby, Powerdown again normally
Additional infos:
Description: Ubuntu 20.04.3 LTS
Release: 20.04

-Systemstarts-
Wed Jan 26 07:44 : 5.13.0-27-generi
Wed Jan 26 08:01 : 5.11.0-46-generi
Wed Jan 26 06:55 : 5.13.0-27-generi
Wed Jan 26 04:39 : 5.13.0-27-generi
Tue Jan 25 20:33 : 5.13.0-27-generi
Tue Jan 25 12:40 : 5.13.0-27-generi
Tue Jan 25 06:53 : 5.13.0-27-generi
Tue Jan 25 06:51 : 5.13.0-27-generi
Tue Jan 25 06:46 : 5.13.0-27-generi
Tue Jan 25 04:31 : 5.13.0-27-generi
Mon Jan 24 22:15 : 5.13.0-27-generi
Mon Jan 24 11:42 : 5.13.0-27-generi
Mon Jan 24 08:38 : 5.13.0-27-generi
Sun Jan 23 06:27 : 5.11.0-46-generi
Wed Jan 19 09:16 : 5.11.0-46-generi
Tue Jan 18 19:19 : 5.11.0-46-generi