Bug 512475

Summary: Missing display settings, color managment
Product: [Applications] systemsettings Reporter: stomza908
Component: kcm_kscreenAssignee: kscreen-bugs-null <kscreen-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: major CC: kdedev, plasma-bugs-null, xaver.hugl
Priority: NOR    
Version First Reported In: 6.5.3   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description stomza908 2025-11-22 16:20:57 UTC
I have issue with missing setting with RGB color change betwwen full/limited only can on my display, also dont see option to change color resolution between 8 bit to 10 bit per color. 
My system is Nobara 42 on KDE
Display Benq2780q that support 10 bit by 8+2 by FRC but to use it i need to switch it in system, and  the color switch option  with this issue can only change via OSD display setting. 
Also using Nvidia GPU 4070. 
WHat i check to  plug out and in DP cable doesn't work to fix the issue.
Comment 1 stomza908 2025-11-22 17:11:41 UTC
version of KDE is 6.5.2
Comment 2 TraceyC 2025-11-25 17:51:05 UTC
Thanks for filing this bug report. Unfortunately there isn't enough information for us to try to figure out what's happening. Please add information about your system as requested in the bug report template. Copy and paste this with the information into a new comment.

STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
KDE Frameworks Version: 
Qt Version: 

Also, please provide the output of this, which will tell us what information your monitor is sending to KDE Plasma

kscreen-doctor -o

Thanks.
Comment 3 stomza908 2025-11-25 19:51:20 UTC
prezes@nobaraludolog:~$ kinfo
Operating System: Nobara Linux 43
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.0
Kernel Version: 6.17.8-200.nobara.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 20 × 13th Gen Intel® Core™ i5-13500
Memory: 32 GiB of RAM (31.1 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 4070
Graphics Processor 2: Intel® UHD Graphics 770
prezes@nobaraludolog:~$
Comment 4 stomza908 2025-11-25 19:53:27 UTC
That's the info from terminal, and how am i get info about monitor output? Am new to linux and some info/tips will be helpfull
Comment 5 TraceyC 2025-11-25 20:04:13 UTC
As I mentioned in my last message, please run this command

kscreen-doctor -o

Then paste the output into this report. Thanks.
Comment 6 stomza908 2025-11-25 20:08:17 UTC
prezes@nobaraludolog:~$ kscreen-doctor -o
Output: 1 DP-2 508d9c93-48ef-42d8-87c2-494e2c9ddb58
        enabled
        connected
        priority 1
        DisplayPort
        replication source:0
        Modes:  1:2560x1440@144.00*!  2:3840x2160@59.94  3:3840x2160@50.00  4:3840x2160@29.97  5:3840x2160@25.00  6:3840x2160@23.98  7:2560x1440@120.00  8:2560x1440@59.95  9:1920x1080@119.93  10:1920x1080@119.88  11:1920x1080@99.90  12:1920x1080@100.00  13:1920x1080@60.00  14:1920x1080@59.94  15:1920x1080@50.00  16:1920x1080@29.97  17:1920x1080@25.00  18:1920x1080@23.98  19:1680x1050@59.95  20:1600x900@60.00  21:1280x1024@75.03  22:1280x1024@60.02  23:1280x800@59.81  24:1280x720@60.00  25:1280x720@59.94  26:1280x720@50.00  27:1024x768@75.03  28:1024x768@60.00  29:800x600@75.00  30:800x600@60.32  31:720x576@50.00  32:720x480@59.94  33:640x480@75.00  34:640x480@59.94  35:640x480@59.93 
        Geometry: 0,0 2560x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: Never
        RgbRange: unknown
        HDR: disabled
        Wide Color Gamut: disabled
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 70% and dimming to 100%
        DDC/CI: allowed
        Color resolution: unknown
        Allow EDR: unsupported
        Sharpness control: unsupported
prezes@nobaraludolog:~$
Comment 7 TraceyC 2025-11-25 20:49:28 UTC
Thanks for the details. The kwin developers will take a closer look from here.
Comment 8 Zamundaaa 2025-11-27 11:33:47 UTC
The proprietary Nvidia driver doesn't support the functionality you're asking for, there's nothing we can do about it.
Nvidia developers are aware of this though and will implement it in a future version of their driver.