The backlight on the CM3-PANEL cannot be controled with normal DPMS. Instead, the brightness is set using PWM on GPIO pin 22. The `thermostat.backlight` program runs as a background process to manage the PWM duty cycle. It exposes a D-Bus service to allow other programs to control the backlight. It also watches for *xscreensaver* events to detect when the screen is blanked and disable the backlight. https://www.acmesystems.it/CM3-PANEL-7-BASIC_backlight |
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settings.json |