In my case the bug with unclean shutdown happens only when my machine (Thinkpad X230) is docked to the Thinkpad ultrabase when shutting it down.
When I shutdown outside of a dock, everything is fine. I don't use ureadahead (have SSD), doesn't matter if there are mounted network filesystems or not, if NetworkManager is running or not.
In my case the bug with unclean shutdown happens only when my machine (Thinkpad X230) is docked to the Thinkpad ultrabase when shutting it down.
When I shutdown outside of a dock, everything is fine. I don't use ureadahead (have SSD), doesn't matter if there are mounted network filesystems or not, if NetworkManager is running or not.