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zanny

Member

From: Baltimore

Registered: 2012-10-05

Posts: 84

Website

4k 10 bit monitor setup

I just got a 10 bit 4k monitor. Testing under Windows and an AMD card shows it supports UHD 10 bit at 60hz. However, Xwininfo is only ever reporting 24 bit color. How can I force X to make just this one screen 30 bit?

Last edited by zanny (2017-08-26 20:11:46)

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: 4k 10 bit monitor setup

I suspect you can't, or at least not easily. Do use google to search the forum and the wider internet as I have a vague idea that I've seen a similar question before and there were answers.

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R00KIE
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rabcor

Banned

Registered: 2013-02-09

Posts: 500

Re: 4k 10 bit monitor setup

You can, sorta, you can force X to do it but the drivers are another matter.

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    30
    SubSection     "Display"
        Depth       30
    EndSubSection
EndSection

This is how you can do it. Unfortunately in my case however, my nvidia graphics drivers only show support for up to 8 bit even if I am using a custom edid that should have 10 bit support, I don't know if there's just sloppy 10bit support on the nvidia drivers on linux or if my edid isn't working or what, haven't fully tested it yet, but putting the above somewhere in xorg.conf.d will make xwininfo display that it is 30 bit.

But for it to really work it probably also needs to be set in your gpu drivers; make sure to test whether it really works or not.

Last edited by rabcor (2017-08-28 08:27:06)

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