Open the macOS DDPM 1.0.2.0017 --> Settings --> Updates tab. Allow it to update to the October 28, 2022 released macOS DDPM 1.0.2.0019. Restart the Apple PC when done. Then retest.
I have a PC and a Mac Mini M1 that are connected to my new C3422WE Dell monitor. I'm also using a Dell KM5221W keyboard/mouse combo. On the Mac Mini M1, I updated the monitor firmware to M2T109. I also downloaded and installed DDPM for macOS, but it doesn't run. It doesn't even open. It's supposed to be supported, no? Everything works fine on the PC side. Thanks!
C3422WE, macOS DDPM 1.0.2.0017 not working