schnitzi99

Correct, I'm taking about the NTP= setting /etc/systemd/timesyncd.conf. Changes are definitely not persistent, i have to change the setting after each reboot. (I did several tests) I cannot rule out...

A short test yesterday showed that there is some kind of (probably hardware) issue. This might be the cause of the problems. Due to holidays I'm not able to narrow...

Ah sorry - I forgot to answer. Problem was a hardware issue. Problem was gone with new hardware. Can stay closed :) Thanks for the support and all the work...