I also have this problem on a fresh 14.04 install. I had to manually sudo apt-get install libpam-smbpass. It seems this bug has been around for a while now: https://bugs.launchpad.net/ubuntu/+source/nautilus-share/+bug/1241857
I also have this problem on a fresh 14.04 install. I had to manually sudo apt-get install libpam-smbpass. It seems this bug has been around for a while now: https:/ /bugs.launchpad .net/ubuntu/ +source/ nautilus- share/+ bug/1241857