Dear Dell,

Would first like to thank you for making this great U2422HE! I really love it and it makes my life easier :).

However, after upgrading my home computer to a Mac Studio, DDPM and the USB inputs from the U2422HE are not recognized? The U2422HE is connected to the Mac Studio M1 though the USB-C upstream port, so it should detected by DDPM and the USB inputs, but that isn't the case. The U2422HE display works fine.

I've tried to connect my old MacBook Air 2012 13" and that works perfectly fine with DDPM and USB inputs (through DisplayPort -> Mini DisplayPort and USB-C -> USB-A data cable), so the ports should work.

Furthermore, I also tried to connect the Mac Studio M1 to the U2422HE with the USB-C to USB-A data cable (having both USB-C -> USB-C and USB-C -> USB-A cables connected), but I get the same results.

From some quick googling, it seems it could be a problem related to DDC/CI which isn't present on M1 Macs (like my Mac Studio), which I can see DDPM has as a requirement: M1 Mac does not support DDC/CI.

Could this be related, and is it something you're resolving with Apple?

Hope you can help me out. I would really like to use DDPM and my USB inputs on the U2422HE :(.