Control monitor brightness via DDC/CI with keyboard shortcuts - fight stupidly simple apps that requires you to pay!!!
- Multi-monitor support with real display names (via WMI/EDID)
- Global hotkeys (default: Ctrl+Alt+Up/Down for brightness, Ctrl+Alt+M to switch monitor)
- On-screen brightness indicator
- System tray with minimize on close
- Windows autostart option
- Configurable brightness step (5-25%)
- Monitor linking (change brightness on multiple monitors at once)
- Multiple brightness APIs if default one does not work
- Per-monitor API selection in Advanced tab
- Ability to exclude monitors from brightness control in Advanced tab
| Action | Shortcut |
|---|---|
| Brightness up | Ctrl+Alt+Up |
| Brightness down | Ctrl+Alt+Down |
| Switch monitor | Ctrl+Alt+M |
| Linked/Single mode switch | Ctrl+Alt+L |
- Windows 10/11
- Monitor with DDC/CI support
- Run as admin for hotkeys to work
- Make sure DDC/CI is enabled in monitor OSD settings
- Try different brightness API in Advanced tab
- Some monitors work only with specific APIs
- Disable problematic monitors in Advanced tab
- If monitors are linked, unlink them and test individually
- Run app as administrator
- Try with only one monitor connected
- Config saved to
~/.luciddc_config.json - If hotkeys don't register, run as administrator
- DDC/CI must be enabled in monitor OSD settings (usually is by default)
LuciDDC.exe - standalone executable, no installation needed
Built with Python, CustomTkinter, screen-brightness-control, pystray.