monitorctl

A way to control monitor brightness through the command line. You can change the brightness of all monitors simultaneously.

Features

• [X] Change brightness of all monitors
• [X] Add multi-threading for perfomance boost
• [X] Use the ddc-i2c crate for perfomance improvement
• [X] Add/Subtract from the current value using -a and -s flags
• [ ] Change Contrast of all monitors
• [ ] Change Volume of all monitors

Installation

Install the dependencies first and then build and install the binary into PATH.

Dependencies

1. DDC/CI feature need to be turned on in the monitors.
2. i2c-dev kernel module should be loaded during boot.
3. Add ~/.cargo/bin to $PATH Environment variable. Add export PATH=$PATH:$HOME/.cargo/bin to ~/.bash_profile or ~/.zprofile
4. Rust Toolchain and git

To preload i2c-dev in ArchLinux

1. Open /etc/mkinitcpio with the following command: sudo vim /etc/mkinitcpio.conf
2. Add i2c-dev to MODULES -> (MODULES=(... i2c-dev))
3. Finally, run sudo mkinitcpio -P to generate linux kernel binaries
4. Reboot your computer.

If the MODULES is empty in /etc/mkinitcpio.conf then, MODULES=(i2c-dev) should be enough. ... represents other modules that are present

Build and Install

1. Clone this repo. git clone https://github.com/5iddy/monitorctl.git
2. Change directory to the repo. cd monitorctl
3. Run make install

Usage

USAGE:
    monitorctl [OPTIONS] <Value>

ARGS:
    <Value>    

OPTIONS:
    -a, --add           Adds the value to the current value
    -h, --help          Print help information
    -s, --sub           Subs the value from the current value
    -V, --version       Print version information

Examples:

1. monitorctl 10 set brightness of all monitors to 10
2. monitorctl -a 10 set brightness of all monitors to current value + 10
3. monitorctl -s 10 set brightness of all monitors to current value - 10