Re: HDR Support in KDE

[Stephen Morris <steve.morris.au@xxxxxxxxx>]

On 10/11/24 04:41, Barry Scott wrote:

On 8 Nov 2024, at 22:59, Stephen Morris <steve.morris.au@xxxxxxxxx> wrote:

Just as a matter of interest what brand monitor do you use. 

I use a Dell Ultra HDR and also have a LG HDR monitor.

The Dell has the HDR checkbox in the Display Settings.

But the LG needed me to enable HDR using the kscreen-doctor command.

No idea why it claimed the HDR was not disabled and not check box to enable it.

    kscreen-doctor is telling me HDR is enabled as well.
    I issued the command to enable HDR on my monitor via sudo and the
    command failed. I'm not sure whether it was my monitor or KDE. As
    shown in the output with the failure kscreen-doctor also did not
    exit, I had to use ctrl-c to exit. 
    
    sudo
        kscreen-doctor output.HDMI-A-1.hdr.enable
      
      [sudo] password for steve:  
      org.kde.kscreen: Failed to request backend:
      "org.freedesktop.DBus.Error.NameHasNoOwner" : "Could not activate
      remote peer 'org.kde.KScreen': startup job failed"
      
      kscreen.doctor: Invalid config.
      
      
      ^C
      
    
    Interestingly issuing the command without sudo exited without any
    messages.
    kscreen-doctor
        output.HDMI-A-1.hdr.enable
      
      steve@fedora:~$

By choice I use Dell monitors because of the quality of the colours and contrast.

The LG was cheaper for a less demanding use, but looks great as well.

In the past I have used BenQ (provided at work) and will not buy personally.

Quality of image was not great. Now your experience of BenQ reinforces my

decision on BenQ.

    I bought the BenQ because I was looking for a 4K monitor and it was
    cheaper that other monitors the store had and the display was better
    than the other monitors the store had available, the HDR was a
    bonus.
    With auto-HDR turned on in the windows display settings in windows
    11, and having apps that support HDR automatically turning HDR on
    when they run, it would be nice to get HDR working in Linux. Having
    said this though, since turning on HDR (I set it to Cinematic HDR)
    in the monitor settings via the buttons on the monitor, at startup I
    have seen messages displayed on the screen about HDR being emulated.
    
    regards,
    Steve

Barry

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