Help Lock screen appear upon disconnect from charger?


The first few weeks that I owned my Stratosphere, whenever I disconnected from the charger, my lock screen would automatically appear (which I liked - the phone was "ready to go").

Now, however, when I disconnect the screen stays dark and I have to manually depress the power button on the phone's right side in order to make the screen lock appear.

Did I inadvertently change a setting that made this behavior occur (or, not occur, as the case may be)?