In attach the rsult of inxi -Fz
And :
I had no problem before 5.5 , I reinstalled 5.4.18 and no problem anymore
Also reinstalled other 5.5.* and each had the same problem
Now I installed kernel from debian , and also no problem
No this is no new hardware , but I was for 3 month in Indonesia (without the desktop)
And NO I does not check everyday for error
Also medion-pc , is the name of the pc from the beginning , but in 2018 aug , the motherboard,CPU and memory have been replaced , so nothing to do with medion support
And Yes the latest bios/uefi stable available on msi.com is flashed