Since systemd-201 machines running with nfs root always can't be reboted/powered off. While the same happens on the regular systems (with root on HDD), this behavior is not 100% reproducible. Most of the times I see following in the console: systemd[1]: Failed to start Store Sound Card State. systemd[1]: Failed to start Power-Off. systemd[1]: Dependency failed for Power-Off. systemd[1]: Failed unmounting /. Nevertheless the messages could be different besides the last two lines. The only solution in this situation is using HW power key or SysRq keys.
I am pretty sure currentl versions do not suffer by this. Closing. If this is still an issue, please reopen.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.