[SOLVED] 9.1.5 & Pi Touch 1: Wrong (max) brightness when waking from screen blanking

[Tim Curtis]

Odd.

AFAIK return from screen blanking is handled by the Xserver subsystem. The screen brightness for the Touch1 is handled by a couple of things.

# config.txt - the overlay creates /sys/class/backlight/rpi_backlight/
dtoverlay=rpi-backlight

# set brightness
/bin/su -c "echo BRIGHTNESS_VALUE > /sys/class/backlight/rpi_backlight/brightness"

Whats the value of /rpi_backlight/brightness after returning from screen blank?