External Monitor Brightness Applet for the COSMIC™ desktop

Change brightness of external monitors via DDC/CI protocol. You can also quickly toggle system dark mode.

Troubleshooting

Maybe you need to setup the necessary udev rules if ddcutil is old. For this to work you need write access to /dev/i2c-*. See https://www.ddcutil.com/i2c_permissions/.

Credits

Originally created by @maciekk64