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After 2021.44.25.2 update, my rear touchscreen is always on even when no one is sitting in the back seat. It used to turn off prior to the update. Anyone else have this issue? Here's a screenshot of what it looks like:
On older Model S and X cars, hold down both scroll wheels until the main screen reboots. Holding down the two buttons above the scroll wheels reboots the dashboard. I don't have a car with a rear touchscreen, so don't know if there are other reboot methods.