You pressed power button three times, a menu or something prevented it from mapping ASUI on the second press but it did lock the screen&keys and the third press unlocked the screen&keys. It didn't receive any key events so you should've only seen the "press dpad" notification when pressing power button, was it also appearing when pressing the keys? Or was it continuously reappearing when not pressing keys?
- sometimes the touchscreen is locked but not the keys