Re: HDR Support in KDE

[Stephen Morris via users <users@xxxxxxxxxxxxxxxxxxxxxxx>]

On 14/10/24 19:53, Barry Scott wrote:

On 14 Oct 2024, at 09:27, Stephen Morris via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

I did a search for HDR/hdr in "System Settings" under Ubuntu which pointed my at the Display Configuration but there isn't any settings for HDR on that page.

What I see is a search for "hdr" takes me to Display & Monitor/Display Configuration. 

On that page I see "High Dynamic Range: [x] Enable HDR". It is line under "Colour Profile".

You can use the "kscreen-doctor -o" terminal command that will report an HDR line.

It will be "incapable" is HDR is not possible and "Disabled" is you can turn it on.

    Thanks Barry. I issued the kscreen-doctor -o command and the HDR
    line in the output specifies "Incapable". Why is this the case when
    a boot into Windows activates HDR as specified in the Windows
    settings, and with "Auto HDR" set when I go into games that support
    HDR I get a message that because of "Auto HDR" the game is
    activating HDR.
    What is happening under linux that is not activating HDR, having
    said this though I have seen those settings in the Display
    Configuration in the past (possibly in F39) so I'm not sure why they
    aren't there now?
    I tried pressing the HDR button on my monitor which turned off HDR
    and B.I, and when I pressed it to turn the two of them back on I got
    a display message that HDR was being emulated and the HDR settings
    still did not appear in the Display Configuration. Kscreen-doctor is
    still saying HDR is incapable after doing this.
    My monitor is a BENQ2870U which is being shown in Display
    Configuration. There is also an Overscan percentage line under the
    Refresh Rate line which I've never seen before.
    Just for reference, below is the output from kscreen-doctor -o.
    screen-doctor -o
      
      Output:
      1
        HDMI-A-1
      
             enabled
      
             connected
      
             priority
        1
      
             HDMI
      
             Modes:
       1:3840x2160@60*!
         2:3840x2160@60  3:3840x2160@60  4:3840x2160@50  5:3840x2160@30
         6:3840x2160@30  7:3840x2160@25  8:3840x2160@24  9:3840x2160@24
         10:3840x2160@24  11:2560x1440@60  12:1920x1080@60
         13:1920x1080@60  14:1920x1080@60  15
      :1920x1080@50  16:1920x1080@30  17:1920x1080@30  18:1920x1080@25
       19:1920x1080@24  20:1920x1080@24  21:1600x1200@60
       22:1680x1050@60  23:1600x900@60  24:1280x1024@75  25:1280x1024@60
       26:1280x800@60  27:1152x864@75  28:1280x720@60  29:1280x720@60  3
      0:1280x720@50  31:1024x768@75  32:1024x768@60  33:1440x480@60
       34:1440x480@60  35:832x624@75  36:800x600@75  37:800x600@60
       38:720x576@50  39:720x480@60  40:720x480@60  41:640x480@75
       42:640x480@60  43:640x480@60  44:720x400@70  45:1600x1200@60  46:
      1280x1024@60  47:1024x768@60  48:2560x1600@60  49:1920x1200@60
       50:1280x800@60  51:3840x2160@60  52:3200x1800@60  53:2880x1620@60
       54:2560x1440@60  55:1920x1080@60  56:1600x900@60  57:1368x768@60
       58:1280x720@60  
             Geometry:
      0,0
        2560x1440
      
             Scale:
      1.5
      
             Rotation:
      1
      
             Overscan:
      0
      
             Vrr:
      incapable
      
             RgbRange:
      unknown
      
             HDR:
      incapable
      
             Wide
        Color Gamut: incapable
      
             ICC
        profile: /usr/share/color/icc/colord/AdobeRGB1998.icc
      
             Color
        profile source: ICC
      
             Brightness
        control: supported, set
        to 100%
      
    
    
    regards,
    Steve

Barry

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