Hello Timur, I have reinstalled my system using snapshot.debian.org to the state of 2025-06-01 which was working for sure. Unfortunately the issue is not resolved. So after I ruled out Kernel and Userland only one thing is left: The BIOS. Unfortunately I updated to a BIOS version which can not be rolled back.
https://www.asus.com/de/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b650m-plus/helpdesk_bios?model2Name=TUF-GAMING-B650M-PLUS > Version 3602 17.27 MB 2025/11/27 > SHA-256 ：C972529E551DC92871B89660E3A3930F187EA6E1B718ADDD7B0E3826D79195C0 > 1.AGESA updated to ComboAM5 PI 1.2.7.0. > 2.Improves compatibility with various CPUs and devices. > Note: This BIOS version cannot be rolled back to previous versions. > Before running the USB BIOS Flashback tool, please rename the BIOS file > (TG650MP.CAP) using BIOSRenamer. I open a case with ASUS. Cheers, Thomas
