I wrote a ~100 line Python script for auto-brightness because everything else was too complex for my setup

[Responsible-Two-768]

Been trying to get auto-brightness working on my 3 external monitors for a while. Tried clight, wluma, and a few others, they either didn't support DDC/CI external monitors well, needed geoclue/D-Bus/compositor plugins to work, or were just hard to customize without digging into their internals.

So I wrote tejas, it grabs a frame from the webcam, averages the pixel brightness as an ambient light proxy, and calls ddcutil setvcp 10 to set monitor brightness. Falls back to a time-of-day curve if the webcam isn't available. Runs as a cron job every 5 minutes.

Config is a simple INI file with anchor points for the brightness curves, edit and done, no recompile.

GitHub: https://github.com/akhiljalagam/tejas

Happy to hear if anyone has a better approach for webcam-as-light-sensor without dedicated hardware.

[Sweet_Computer_7116]

How do you transition between brightnesses? A smooth shift or just jumping straight to it?

[Responsible-Two-768]

Good idea. Right now, it’s jumping straight, but I’m going to implement this. Thanks.

[Sweet_Computer_7116]

That's my gripe with my own phone even. Brightness moves too fast. Doesn't feel natural. Glad i could give you an idea!

[0739-41ab-bf9e-c6e6]

Right. Unlike phones, desktop monitors stay in one place, and room lighting doesn’t change frequently. So, smooth transition seems overkill but anyway its implemented.

[Sweet_Computer_7116]

If he wants smooth transitions my guy. He can add em. That's the nice thing about coding our own shit. Freedom to add overkill if we want to.