Hi all

I just received a P2422HE to use with my Latitude 5320 (Thunderbolt 4, Intel Iris Xe).

I'd like to use it as a hub and daisy chain my other monitor to it, which is a Phillips 276B9 (QHD 2560x1440 @60hz or 75Hz,  DP1.2).

The problem is that this secondary display is limited to a FHD resolution (1920x1080) in Windows 10, no matter what I try.

I disabled the integrated display because I don't use it in docked mode but it doesn't help.

My setupe :

Latitude 5320 TB4 port -> USB-C to USB-C cable (included with my P2422HE display) -> P2422HE USB-C port

P2422HE DP out port -> DP to DP cable (also included with my P2422HE display) -> Philips 276B9 DP IN port

MST is activated in the P2422HE OSD, I double checked (and daisy chaining works, it's just that the resolution is not good).

Is this a hardware limitation of one of the component in the chain ? To my understanding, this should work.

My laptop's TB4 port supports 3 external 4K monitors (I'm far from this bandwidth), the graphic card (Iris XE) supports 3 external QHD monitors (also far from this bandwidth), I use the included USB-C to USB-C cable .... So to me everything should be OK.

Any idea on why this doesn't work the way I expect it to, and what I could try ?

BTW, Latitude is fully updated, including bios, and I installed the P2422He driver.

Thanks for helping !