Would like people to test my fork which has support for PBP mode + custom VCP codes

[itxch]

Implemented PBP mode and it works on my monitor Dell U4320Q.
Also added ability for users to enter a specific VCP code and to modify that value
Would like other people to test - also got instructions on how to implement it for your monitor if it doesn't work.
Fork is here: https://github.com/itxchh/ddcctl
Instructions in the readme.

Happy to answer any questions

[rbradcurtis]

I have this hardware and will test this week. One suggestion: a handy feature that would complement this change would be the ability to set the various subdisplay inputs when activating PbP mode.

Given the addition of the -vcp, I presume this change shouldn't be too difficult if the appropriate VCP codes can be identified.

As I understand it, there is always the primary input and then up to 3 subdisplays depending on the specific PbP mode.

[itxch]

Yeah there is -php-screen flag which sets the secondary display. But in my monitor unfortunately only have a primary and secondary. But if you identify others let me know and I can easily add them.

This could also be done manually via the -vcp flag as you've spotted.

[nk9]

I'd love to be able to control PBP from the command line, so I'd like to test… but I'm wary of bricking the monitor with incorrect settings after having read this bug. I have a Dell U3219Q. Any way I can check before I run your code to see if it's compatible with my hardware?

[itxch]

I'd love to be able to control PBP from the command line, so I'd like to test… but I'm wary of bricking the monitor with incorrect settings after having read this bug. I have a Dell U3219Q. Any way I can check before I run your code to see if it's compatible with my hardware?

While of course, I cannot guarantee 100% that the same bug will affect you of course, if you check out my fork, and the guide on how to find your own pbp value. I don't think anything can go wrong. As you will be setting the value to what the monitor sets it to.

[kfix]

good luck on your fork @itxchh. I'm going to close as this is not a support/discussion forum - I'm afraid I'm going to have to close down issues because of all the randomness being sent in that I don't have time to prune anymore.

I think I'd not agree to integrating a -pbp feature as it seems unlikely to be useful across a majority of the monitors with a hardcoded vcp value. I have an (old) LG ultrawide at home that claims to support it so might try it, but even it works my reservation still holds.

the -vcp arg you added looks useful for experimentation, although to add that upstream I think it'll need to flash big bright red letters and prompt before applying, unless a -force-vcp is used. We've heard of monitors being broken/bricked from using atypical VCP codes (#58).