Some other program running may be grabbing the keyboard/mouse. Attach output from "ps aux" before locking the screen.
** Summary changed: - (Flight6) lock screen + Password dialog displayed immediately, without keyboard or mouse activity -- Password dialog displayed immediately, without keyboard or mouse activity https://launchpad.net/bugs/38834 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
