What release of Ubuntu are you using, and could you please give the exact steps necessary to reproduce this?
Thanks. ** Visibility changed to: Public ** Changed in: lightdm (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/919498 Title: Guest users can resturn to admin with no password prompt Status in “lightdm” package in Ubuntu: Incomplete Bug description: Senario: Admin clicks his Me-menu and selects the guest session to allow a untrusted person to use the computer. Simply pressing ctrl+alt+f7 returns back to the admins screen with out a password prompt and might even preforme administrative tasks if sudo is still elivated. Note the guest session would here be found under ctrl+alt+f8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/919498/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp