System then boots up fine again.
Got no hints for the cause when looking into journalctl -b-1 in chroot environment. Guess hang occurs when Journal Service wasn’t started yet.
Will try again with systemd>257-1.
Very strange… have rebooted a couple of times after first update attempt and boot hung every time.
Now updated again to 257-1 and set systemd.log_level=debug in commandline to try to get some error message… system boots up just fine. Removed systemd debug and still boots fine. Can’t reproduce anymore.
Well… guess issue solved, but user confused
Had the same problem on my Thinkpad T480. After pressing the enter key it would continue booting. I shutdown the machine and thought that I would have to rollback today. To my surprise the issue did not appear anymore today. Maybe the shutdown ‘solved’ the issue, I only tried restarting it yesterday.