sub-optimal GUI to adjust brightness through software-rendering rather than the hardware controller (as best i understand). can only confirm it works to change brightness levels for my Legion Slim 7 on Pop OS and Linux Mint. Brightness did not work prior on fresh installs of both Pop and Mint. Resorted to using xrandr in the terminal to change it but figured a simple GUI with a slider would be convenient until/if we get full hardware compatbility. Haven't tested further to confirm support for other Lenovo Legions unfortunately. Other than the small GUI display for the brightness controller, the only thing this script does is invoke: xrandr --output DP-4 --brightness value where value is grabbed from the current value of the slider.
Note The above command uses a specific display identifier (DP-4), but this likely won't be yours. To find your identifier launch a terminal and type:
xrandr | grep -w connected | awk -F'[ ]' '{print $1}'
Example Output: DP-4
Auto run script will pass the 2 arguments needed for you, but these are them in case you're curious:
[Note You'll need both parameters enclosed with a backtick (`), not the apostrophe]
-1st argument gives program your system's current brightness,
Exanple Input of 1st Argument (enclosed with backticks, but they might not be visible)
xrandr --verbose | awk '/ connected /{}/Brightness:/{print $2}
2nd Argument gives program your system's connected display identifier
xrandr | grep -w connected | awk -F'[ ]' '{print $1}'
[To Run]
Clone the repo into a ~/build directory.
Execute the ./run.sh script to run the GUI.
sudo chmod u+x run.sh
(optional) cp run.sh /home/$USER
./run.sh
if you want to run manually:
javac solve.java
java solve xrandr --verbose | awk '/ connected /{}/Brightness:/{print $2}' xrandr | grep -w connected | awk -F'[ ]' '{print $1}'
Note The above 2 parameters need to be enclosed with backticks (`), they won't show on Github.
*Tips: This can be useful as a panel plugin that could run the above command when the plugin is clicked on.
See https://github.com/levimake/xfce4-genmon-panel-scripts
An example (xfce-only) would be adding one of the Genmon Monitor plugins to your XFCE panel and having the plugin run bash /home/$your-name/your-script.sh and inside this script.sh you would have an on-click command: java solve arg0 arg1 (with back-ticks (`) enclosing arg0-1)