Is it possible to change the backlight of a second monitor? It seems that xbacklight can only change the backlight of the first monitor, i.e. in my case the laptop's integrated display. I'd like to change the backlight of an external monitor.
Here it is suggested to use a tool called ddcutil. Unfortunately this doesn't compile under OpenBSD because it depends on libudev. https://unix.stackexchange.com/questions/421307/how-can-i-change-the-backlight-of-an-external-monitor I'm aware of 'xrandr --brightness', but of course brightness isn't the same as the backlight (see xrandr's man page). Thanks for any hints Max
