@ Amnon82 I do not think you need to use "sudo" for the steps mentioned by Oliver unless you are locking and unlocking as root. Please try it again without sudo:
Also can you try the following along with above ? 1. cat /etc/pam.d/gnome-screensaver Also list the contents of any files mentioned inside /etc/pam.d/gnome- screensaver with @include directive. 2. Can you do the following and see whether unlocking works ? sudo chmod 4755 /usr/bin/gnome-screensaver kill `pidof gnome-screensaver`; gnome-screensaver -- screen does not unlock after locking https://launchpad.net/bugs/76632 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs