Excellent work on debugging the problem up to IC level! Hoping the new chip works out for you!

Hmm if that’s the case, I think we should first confirm the following:

1. Check if the monitor works using the USB-C to DisplayPort adapter
   • If you have any other device (not the Mi Notebook Pro) that has a USB-C port and has DP alt mode you can use that
   • This also tests if the USB-C to DisplayPort adapter works
2. If test #1 doesn’t work,…

[Read more]

Hi @Chris,

Choetech had set-up an account in an online shopping website in my country (Philippines) and that’s how I was able to buy the device. Maybe you could check online shopping websites in your country and see if they’ve set-up an account there as well.

Best of luck!

Note: DP alt mode is only supported on the USB-C port that also acts as…[Read more]

Hi @Marco,

Firstly, according to @reflian‘s hypothesis, the Choetech USB C to HDMI adapter (the one I’m currently using) apparently uses DP-alt mode and then converts the signal to HDMI 2.0 (and maybe lose some of the data that isn’t need by HDMI 2.0) within the adapter then the HDMI 2.0 signal output is used by the external monitor.

So, in this…[Read more]

Hi @Marco,

Firstly, according to @reflian‘s hypothesis, the Choetech USB C to HDMI adapter (the one I’m currently using) apparently uses DP-alt mode and then converts the signal to HDMI 2.0 (and maybe lose some of the data that isn’t need by HDMI 2.0) within the adapter then the HDMI 2.0 signal output is used by the external monitor.

So, in this…[Read more]

Hi @Marco, unfortunately my external display is capped at 60 Hz so I wouldn’t be able to test the setup you specified even if I wanted to.

If your fps is the same when playing on the external monitor as on the laptop display, maybe the default video card used by the applications in your laptop is the intel UHD 620 graphics and not the MX150. I…[Read more]

A bit too late to the party but I just would like to add that reflian’s solution works on my 2017 i5 Xiaomi Mi Notebook Pro.

Attached a picture that shows the working 4k @ 60Hz with power and without power.

Thank you very much reflian for sharing your findings. Wishing you and the others a Happy New Year!