USB-C hub not working properly

[Clement-su]

HP Spectre x360 13.5 in with windows 11 - 23H2 (intel i7)

Have been having external monitor connectivity issues almost since purchase.

3 different USB-C hubs have been used to connect HDMI-HDMI to an external monitor but does not work.

only the only USB dongle hub supplied with HP in the box works.

Now i purchase another DP to USB-C (8K @ 60Hz) cable and the external screen still does not want to show up.

the monitor running is a Wide 2K 3440 x 1440 @ 100Hz.

The same cable and monitor work when connected to another monitor, but constantly fails on the HP x360.

Surface studio( i5 with intel iris)

[banhien]

@Clement-su 

Its specs

           https://support.hp.com/au-en/document/ish_7694497-7694541-16

It has  (2) USB4™ with Thunderbolt™ Type-C ports; 40 Gbps signaling rate (USB Power Delivery, DisplayPort™ 1.4, HP Sleep and Charge) ports. In theory you can NOT get anything over the  DP 1.4 specs.

>>>> USB dongle hub supplied with HP in the box works.

Must be by some reasons HP supplied that adapter. Please note: All vendors claim STANDARD USB-C but most of the times  that was their STANDARDs, not everyone standard.

Regards.