I have this happening too, when connecting to a share using cifs over a wireless connection (WPA with Network Manager)
I'm running Dapper Drake 6.06LTS with the latest updates. I don't know exactly how long the umounting takes, since I assumed it had hung and so I shut it off manually (power button held down). Maybe the solution is to either disconnect all mounted network shares before turning off the network connection (either wired or wireless) or have the cifs umount program not wait for a response (since there is no route to host anyway!). Cheers, Vipul -- Long delay unmounting remote filesystems on shutdown https://launchpad.net/bugs/49695 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs