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10bit display on Gtx - with this one simple trick

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anon_user_37409885
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Wanted to do this for almost a decade, and not sure how well known this is, but to get the all-fabled 10bit or billions of colours display on a GTX card on Linux, an expensive feature normally reserved for Quadro cards:

Edit the /etc/X11/xorg.conf and in the ‘Screen’ section, change DefaultDepth and Depth from 24 to 30.

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    30
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-4"
    Option         "metamodes" "nvidia-auto-select +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       30
    EndSubSection
EndSection

Driver 415.27.0.0, Gtx 1080ti, Kubuntu 18.04
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