You are welcome. I just yesterday found about about this which updates most nVidia cards so that when the monitor in a multiple display setup are turned off all the windows on that screen do not get moved to the main screen.
How does one do this? On my desktop I currently use the ddccontrol and gddccontrol packages, but it would be awesome if the backlight slider existed the same as on my laptop.
On Mac, I wrote a config [1] which uses `ddcctl` [2] cli tool to sync both brightness and volume using keyboard buttons. It worked quite well, although I haven’t used it for a while. I guess similar idea could be extended for linux too.
My early-2000's Apple DVI displays support software brightness controls. Is that some proprietary feature that still hasn't been added to the general protocols?
