Hi all,
I finally found a solution for this on my system. I seems that it works fine now.
It seems the problem is NFS-related, but it is not directly related to nfs.service. So disabling this does not help.
The system hangs on nfs-config.service. And this is before nfs.service.
I modified /usr/lib/systemd/system/nfs-config.service
I modified the line:
After=local-fs.target
to this:
After=local-fs.target network.target
Please try if this solution works for you too and report it here.
I think, nfs-config.service is simply startet to early. I came to this, because booting works reliably when network cable is disconnected.