Quote:Direct connection of MAX3232 to the LVDS adapter is described as optional only just in case LVDS can auto-switch sources?
Yes. OpenAuto Pro will forward press of desired button (e.g. NAV or NAME) which will trigger LVDS adapter to switch video source.
Quote:I still can't figure out why PI connected to the LVDS directly - panel buttons would work. PI connected to the TV Tuner - panel buttons would not work? Why?
OpenAuto Pro will read button presses in both cases. The reason is very simple. When you watch a video using factory TV tuner and then you press any button on buttons panel, MMI 2G will hide the video stream and go back to the MMI 2G interface. OpenAuto Pro does not bypass connection between buttons panel and MMI 2G head unit - it listens signals from buttons panel simultaneously with MMI 2G head unit. There is no known way to avoid that using factory TV tuner.
You can still use factory TV tuner if you do not want to control OpenAuto Pro interface using factory buttons panel.