Made an account to say that #52 worked for me. After upgrading to Ubuntu 14.04 from 12.04, I had lost sound, the ability to shut down/reboot as a normal user, and the ability to mount external SD cards/hard drives. Did "sudo pam-auth-update --force" and "sudo apt-get remove --purge libpam-ck-connector" as #52 suggested, and after a reboot, everything worked again!
I should say that at this point my pam.d is close, but not identical to, a fresh 14.04 install.
Made an account to say that #52 worked for me. After upgrading to Ubuntu 14.04 from 12.04, I had lost sound, the ability to shut down/reboot as a normal user, and the ability to mount external SD cards/hard drives. Did "sudo pam-auth-update --force" and "sudo apt-get remove --purge libpam- ck-connector" as #52 suggested, and after a reboot, everything worked again!
I should say that at this point my pam.d is close, but not identical to, a fresh 14.04 install.