Support for external monitor brightness (DDC/CI) in Waybar

[negoro26]

Right now, there isn't a native way to tweak external monitor brightness without reaching for the physical buttons on the screen. I’ve been using a script that bridges this gap by bringing ddcutil control into Waybar. It feels consistent with the rest of the Omarchy experience. It’s snappy, handles the hardware lag in the background, and uses the same scroll/click logic we're already used to for volume.

To make this work smoothly without freezing the status bar (since DDC/CI can be slow), the script handles the hardware communication as a background process and uses a temporary file to track the current state.

---

Implementation

• Gist: Waybar DDC/CI brightness control script
• Dependencies: Just install ddcutil
• Signals: Uses RTMIN+9 to avoid clashing with other modules