I've recently bought a Z38c curved screen and I've 2 issues with this.
I try it on HP X360 1030 and also on HP Elitebook 1040 G4 and I've same issue.
First USB hub of the screen is not detected.
I already activate into menu of the screen Power Control > Power Mode > Performance > Save and Return
But this doesn't solve the issue
I also have another issue with my screen regarding the language of the menu. I put the language into English or French, save the settings, go through the menu that is English or French. When i've finished to work, i shutdown my laptop and shut down all electricity plug of my desktop.
When I come back some days later, power on my laptop and the Z38c screen, the menu of the screen come back to Portuguese language
I am disappointed with this screen which ultimately works less well than my old one (which also had integrated usbc connectivity) which cost 4 times less.