Just did double check of MoarningSun observation results... it's absolutely correct: gnome-power-manager settings work just fine. Once disabled lock not appear when using either timeout suspend or keyboard hotkey. My workaround appears even simpler, I replaced standard applet with old "Power Down..." applet (look like red power button). It rises window with choice of suspend, log off and shut down options. Almost the same but works correctly (at least on my machine).
Just did double check of MoarningSun observation results... it's absolutely correct: gnome-power-manager settings work just fine. Once disabled lock not appear when using either timeout suspend or keyboard hotkey. My workaround appears even simpler, I replaced standard applet with old "Power Down..." applet (look like red power button). It rises window with choice of suspend, log off and shut down options. Almost the same but works correctly (at least on my machine).