Reduce Brightness in raspberry pi display

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Mon Nov 15 2021 04:01:22 GMT+0000 (UTC)

Saved by @Aaa@123 #bash

echo n > /sys/class/backlight/rpi_backlight/brightness
sudo bash -c "echo 0 > /sys/class/backlight/rpi_backlight/brightness" # if permission denied in above line
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https://raspberrypi.stackexchange.com/questions/46225/adjusting-the-brightness-of-the-official-touchscreen-display