DDC/CI

[Vaielab]

Hello,

I have a LG 34UC88-B with 3 computer plug into it. (Two hdmi and one displayport)

Normally I use the monitor menu to switch from one computer to an other but it's not the easiest way possible, so I started to look into DDC/CI where I can directly send commands to the monitor.

Most of my computer are on debian so I'm using ddccontrol (https://github.com/ddccontrol) to send data.

When I'm on my main computer (display port), I can switch to any of the hdmi port with the command "sudo ddccontrol -r 0x60 -w 18 dev:/dev/i2c-4" or "sudo ddccontrol -r 0x60 -w 17 dev:/dev/i2c-4"

And from any hdmi I can switch to the other hdmi without any problem with the same command.

 

But I have a problem when I try to return to my main computer (display port). The only value that change something is 14, and I get an error message on screen telling me that nothing is plugged in.

So, do you know if there are a second command to activate the display port, or something else I'm not doing right?

Thanks