UPDATE: Confirmed for X930BT running 4.0010 Z140 firmware (unconfirmed on pure X940BT).
Background: I am using the reverse camera as a video input for some digital gauges I've managed to get working via a long string of hacks. I originally had the video driving the AV2 input on the X930BT, but I realized that I am not able to listen to music and display the (video-only) gauges, so I decided to try using the input for the reverse camera since it is just an overlay on top of whatever source is driving the sound, and then use an external switch to toggle the 'reverse / gauge' mode.
Well,