[ubuntu] Lock Computer doesn't effect

view full story

http://ubuntuforums.org – Hi, after installing Ubuntu 11.10 from scratch. i installed also GNOME 3.2. i defined two users. 1. Administrator 2. Standard user. i defined the Administrator as password log in and the standard user without password. i defined an administrator log in password in the "System setting" - "User Accounts". the problem is when i log in as standard user, i can switch to administrator without password required, and i can continue to working. in addition, when i chose to log in as administrator after the computer start up, the login screen appear, i press on the log in and i l (Hardware)