after years of suffering with this bug, I found a solution that works for me. I put a pre-down dispatch script for network manager to dismount nfs shares when bringing the network down. This works even if a reboot is run from a shell.
In /etc/NetworkManager/dispatcher.d/nfs.sh: /etc/NetworkManager/dispatcher.d/pre-down has a link to it as well. #!/bin/bash IF=$1 STATUS=$2 logger -s "********************** NetworkManager dispatch script nfs, IF="$1" STATUS="$2 case "$2" in pre-down) umount -a -t nfs service cups stop ;; up) mount -a -t nfs ;; esac I do NOT use the systemd automount fstab option as it'll try to automount when this script is trying to dismount the nfs shares. I also have it stop cups as kubuntu sometimes hangs bringing cups down. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1438612 Title: remote file systems hang on shutdown, D-BUS stops too early To manage notifications about this bug go to: https://bugs.launchpad.net/dbus/+bug/1438612/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs