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

Discussion in 'The Linux Corner' started by sharpUltramarineBlue569, Apr 16, 2022.

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  1. 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...
    Martin989 likes this.
  2. .Z4x.

    .Z4x. Active Member

  3. I have the same configuration and i can't get hdmi external monitor working, did you find any fix for this?
  4. .Z4x.

    .Z4x. Active Member

    I'm not sure which post you're responding to,
    or if you had a chance to go through the material
    I linked above.

    In either case, as you may deduce from perusing
    the links I posted, HDMI will NOT work with iGPU,
    but you can get iGPU output on USB-C with the hack.
    Assuming it works for your BIOS version...
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