Can't use External Monitors on Razer Blade 15 Advanced late 2021 (RZ09-0409) Debian 11

Hello All,

This is my first post, so sorry for any mistakes here.

I recently bought a Razer Blade 15 advanced late 2021 (core i7 + 3070) for use in research (Robotics and AI).
I installed Debian 11 and initially had some issues with kernel 5.10, namely wifi and Bluetooth not working. After some search online, I could improve it by installing the most recent kernel (5.16).
The next pain was the Nvidia setup. First I tried to install the nvidia driver from Nvidia website, which was a bad experience (first due to the Xorg config, my laptop screen was not turning on, and I could only use it in Nvidia-only mode). Finally, I settled for Debian driver 470 (via backports).
The system runs fine, I can use the GPU for training models and stuff, but when it comes to using external monitors on both USB-C and HDMI it simply does not work (I know that the external outputs are linked directly to nvidia). There is a workaround though:

xrandr --setprovideroutputsource NVIDIA-G0 modesetting
xrandr --auto​

These commands activate the nvidia outputs, but it is strange:

• The refresh rates on external monitors are strange, for example, I have a ultrawide 3440x1440 monitor and when it is connected through USB-C its maximum refresh rate is 50 hz and when connected through HDMI its from 85 to 100 hz (I am not mistaken).
• Furthermore, GPU usage goes to 30-40% just to output graphics to the monitors.

I did a lot of research on the topic and could not find a solution that fixes my system. Did anyone have the same experience in another model or in the same model? Also, does anyone has a functioning Optimus configuration? I am using only the prime offload.
It is not a dealbreaker to me, but would like to have a minimally functioning PC...

 

I have the 4K touch version and described my experience in the following thread:
https://insider.razer.com/index.php?threads/studio-2020-or-2021-blade-17-for-ai.78865

Luckily, I managed to find a way to route external ports to the Intel GPU
https://hub.docker.com/repository/docker/andraxin/blade15.21dp-in

This works on the 1.09v3 BIOS. I haven't taken the jump to the latest 2.02,
although the (hidden) Dp-In Connection Policy settings appear identical.

Which BIOS version do you have?