Brightness control using ddcutil

by themightydeity

Brightness slider for all the monitors detected by ddcutil This tool uses ddcutil as backend for communication with your display. Add your user to `i2c` group so that you can call `ddcutil` without `sudo`. Make sure that your user can use following shell commands. `ddcutil getvcp 10` to check the brightness of a display and `ddcutil setvcp 10 100` to set the brightness to 100 It automatically supports multiple displays detected by `ddcutil detect`

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