Why I got 1920x1080 when using HDMI on the desktop dock?but when I use display port I got 3440x1440.

wwannistelrooy

Screenshot_20200413-033527129~2.jpg

Volodesi

Probably because your monitor only has HDMI 1.4 spec.

I think the Dock targets 60 hz minimum, and HDMI 1.4 spec only does 4k/30Hz.

https://www.hdmi.org/spec/hdmi1_4b