[John Carlo]

Hi @Hans,

I tried it today and it worked! Thanks for figuring it out!

[John Carlo]

Hi @Hans!

Bought the laptop as well (last week) and I am also having difficulties with this (upgraded to Win11 Pro). Let’s work together to figure this out 🙂

According to the specs sheet in Xiaomi’s website (https://www.mi.com/redmibook/pro15-intel/specs), here are the list of pre-installed software:

• Genuine Office Home and Student Edition, DTS Audio Processing, Xiaomi Cloud Service, Xiaomi Computer Assistant*, Xiao Ai, MIUI+,
• Fn+K performance smart selection mode (quiet mode/balanced mode/speed mode), Fn+S refresh rate quick switching function (60Hz/90Hz),
• NVIDIA GeForce Experience (dedicated graphics installation only)

From the list of drivers, I think everything was covered in the “System recovery and application” section except for “DTS Audio Processing”, the Fn+K/Fn+S software that we want, and “NVIDIA GeForce Experience”.

I was hoping it’s going to be under “Application software” but I think it only contains “Xiaomi Cloud Service”, “Xiaomi Computer Assistant”, and “Xiao Ai”.

Can you list the specific applications/drivers you installed on your end? (or did you install all of it like you mentioned in your post?). Maybe we can do process of elimination.

Hoping we can figure this out!

[John Carlo]

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

[John Carlo]

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, it’s either:
   • The monitor doesn’t work when the input signals are coming from the DisplayPort
   • The USB-C to DisplayPort adapter does not work (you can confirm this if you have any other device (not the Mi Notebook Pro) that has a DisplayPort and use that to display to the monitor)
     • If the monitor worked with direct input from the DisplayPort, try out the other adapters to test if they are also properly working
3. After the two tests above, we can now say if the monitor and the adapters work properly
   • If they worked properly, this means the problem is the Mi Notebook Pro USB-C port. It might be the case that the connection between the iGPU and the USB-C port has been severed. Or that the DP-alt mode functionality of the USB-C port broke.

[John Carlo]

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 the charging port. I have also not tested if there’s a DP alt mode for the i7 version. Maybe you could check first with a USB-C to HDMI (without power in) adapter to check if the laptop supports it (maybe the port’s DP alt mode functionality broke)

 

[John Carlo]

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 NVIDIA PhysX tab screenshot I attached in this post, you can see that the laptop reads it as a DP signal even though I’m using a HDMI 2.0 cable to connect to my monitor (see the picture in my previous post). Unfortunately, it seems that my external display is being managed by the iGPU even though I’m using the USB C port with the Choetech adapter.

With this, I think there are four possible explanations:
1. The Choetech adapter limits the data such that my dGPU can’t display to my external monitor (I think this is unlikely the case)
2. HDMI 2.0’s specification is not good enough to be able to handle signals from dGPUs (I think this is highly unlikely)
3. Displaying to the external monitor using the dGPU is not possible because of the hardware limitations of our laptop. That is, there is no physical connection between any of the output ports (that can be used by monitors) and the dGPU of our laptop. (I think this might be the case, unfortunately)
4. The laptop is programmed to use iGPU by default but then switches to dGPU for heavy graphics rendering. This feature might work for some games and might not work for others. It might be dependent on what technologies those games used (this might explain the external monitor performance inconsistencies you observed while playing CS GO and Rocket League)

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[John Carlo]

Marco wrote:

(Extremely late to the party, but hey Hello, I have a small request for you if you don’t mind. Could you maybe test if your setup can output 1080p at 144 Hz (or even 120 Hz)? I just bought a 144 Hz monitor that I plug in via HDMI and I can achieve 1080p 120 Hz. The problem I have is that when I try to play CSGO, my fps (and dGPU utilization) on the external monitor is way lower than when playing on the laptop display. This is because de HDMI is controlled by the integrated intel UHD 620 graphics and not the MX150. I would like to know if this can be bypassed by using the Choetech or Xiaomi adapter and a DisplayPort cable. The weird thing is that when playing Rocket League, my fps (and dGPU utilization) is about the same when playing on the external monitor as on the laptop display.

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 think you can change that in the NVIDIA control panel (right click desktop and select it among the list). Hope this helps you, cheers.

[John Carlo]

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!

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