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Can't control backlight
I am using the official 7" touchscreen Pi display.
I've got the screen rotated and touch is working, thanks to posts I found on this forum

However, I can't control the backlight, because the /sys/class/backlight/ folder is empty. All of the tools I found utilize this folder's subfolders to change brightness etc

Anyone know how to get the touchscreen to be in /sys/class/backlight?

Controlling backlight is not supported by Tinker board drivers.

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