Comment 192 for bug 211631

Steve, turns out, there already was such a bug report:

https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1066484/comments/11

Regarding the CIFS mounts: Today, I changed the "auto" cifs mounts during startup to "noauto,user" mounts, which get mounted by my user using a script after login. At the end of the day, the delay upon shutdown was gone.