Comment 31 for bug 303458

"
Release: Jaunty

Since a recent upgrade (around the 16th of March), sudo has been broken. Entering the correct password causes sudo to simply exit and not run the command, it was found that this could be fixed by commenting/removing the line

"auth optional pam_smbpass.so migrate"

in /etc/pam.d/common-auth

If the above line is present and not commented out, sudo or even su, will not work.
"