ddcutil VS ddcui

Apologies. I hate when people do that as well.

In addition to the other links posted, ddcutil.org has some more good info: https://www.ddcutil.com/#introduction

Sous Linux j'avais utilisé ddcutil

Most monitors have a Virtual Control Panel (VCP), which implements features defined in the Monitor Control Command Set (MCCS). This is a VESA standard. You can find the Input selection command in table 8-10. You send these commands over an I2C bus called Display Data Channel/Command Interface which is yet another VESA standard. If you are running Windows https://www.nirsoft.net/utils/control_my_monitor.html will let you use every VCP feature your monitor has. For Linux, https://www.ddcutil.com/ does this. For Mac, https://github.com/alin23/Lunar

The protocol is called DDC , it's a VESA standard. In there, it's called VCP features. If you are running Windows https://www.nirsoft.net/utils/control_my_monitor.html will let you use every VCP feature your monitor has. For Linux, https://www.ddcutil.com/ does this. For Mac, https://github.com/alin23/Lunar note how all three mention input selection.

ddcutil (a command-line tool, and what most UI tools are based on)

A related non rust tool (that also has an optional GUI) is ddcutil. How does this compare to that?

I've also used ddcui: https://www.ddcutil.com/#introduction, available as an AUR package: https://github.com/rockowitz/ddcutil. This has a nice GUI: https://www.ddcutil.com/screenshots/ddcui_features.png and works on everything I've tried it on out of the box.

It's not the answer to your question, but you can use: Brightness Control: https://store.kde.org/p/2015475 or ddcui: https://github.com/rockowitz/ddcui for now.

This widget uses ddcutil (https://www.ddcutil.com/) under the hood. You can just use its command line interface or build a GUI wrapper around this, which is exactly what I did here. There are also GUI applications like https://github.com/rockowitz/ddcui available, though they lack DE integration of course.

There's also a GUI for ddcutil called ddcui if you happen to need that. There might be more unofficial ones out there, just search for "ddcutil GUI".

You can use https://github.com/rockowitz/ddcui instead of having to fiddle with buttons on your monitor

On Linux there are ddcui and gddccontrol (from ddccontrol), although they probably aren't as polished as the options for Windows/macOS. There is also the non-mainline ddcci driver, which lets Linux systems manage external monitor brightness just like it would internal screens on laptops.

https://github.com/rockowitz/ddcui

Would suggest DDCUI https://github.com/rockowitz/ddcui