Bug 511984

Summary: 75 Hz is missing from the monitor settings
Product: [Plasma] kwin Reporter: Konstantin <jon9097>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: normal CC: kdedev, xaver.hugl
Priority: NOR    
Version First Reported In: 6.5.2   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Scr

Description Konstantin 2025-11-12 09:06:51 UTC
Created attachment 186719 [details]
Scr

I have an acer vg240y monitor. It supports 75Hz. But now the option to select 75 Hz is gone. I noticed the other day that the picture had changed and saw that 60Hz was the maximum that could be selected.

Operating System: Arch Linux 
KDE Plasma Version: 6.5.2
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.7-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 32 × AMD Ryzen 9 9950X3D 16-Core Processor
Memory: 96 ГиБ of RAM (93.9 ГиБ usable)
Graphics Processor: NVIDIA GeForce RTX 4080
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: X870E AORUS ELITE WIFI7
System Version: Default string-CF-WCP-ADO
Comment 1 TraceyC 2025-11-13 19:50:46 UTC
Thanks for the bug report. Can you please run the following command in a terminal:

kscreen-doctor -o

Then paste the output into this report. Thanks.
Comment 2 Konstantin 2025-11-13 20:23:45 UTC
(In reply to TraceyC from comment #1)
> Thanks for the bug report. Can you please run the following command in a
> terminal:
> 
> kscreen-doctor -o
> 
> Then paste the output into this report. Thanks.

Output: 1 HDMI-A-1 803f1f6d-5e99-4027-acf0-86a3969a6adc
        enabled
        connected
        priority 2
        HDMI
        replication source:0
        Modes:  1:1920x1080@60.00*!  2:1920x1080@59.94  3:1920x1080@50.00  4:1680x1050@59.95  5:1280x1024@60.02  6:1440x900@59.89  7:1280x800@59.81  8:1152x864@75.00  9:1280x720@60.00  10:1280x720@59.94  11:1280x720@50.00  12:1024x768@70.07  13:1024x768@60.00  14:800x600@60.32  15:800x600@56.25  16:720x576@50.00  17:720x480@59.94  18:640x480@59.94  19:640x480@59.93 
        Geometry: 0,180 1920x1080
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 33% and dimming to 100%
        DDC/CI: allowed
        Color resolution: unknown
        Allow EDR: unsupported
        Sharpness control: unsupported
Output: 2 DP-1 263cadbf-c264-431c-a9d4-592c99db1487
        enabled
        connected
        priority 1
        DisplayPort
        replication source:0
        Modes:  20:2560x1440@144.00*!  21:2560x1440@120.00  22:2560x1440@59.95  23:2560x1440@59.95  24:1920x1080@119.88  25:1920x1080@60.00  26:1920x1080@59.94  27:1920x1080@50.00  28:1680x1050@59.95  29:1280x1024@75.03  30:1280x1024@60.02  31:1440x900@59.89  32:1280x960@60.00  33:1280x800@59.81  34:1152x864@75.00  35:1280x720@60.00  36:1280x720@59.94  37:1280x720@50.00  38:1024x768@75.03  39:1024x768@70.07  40:1024x768@60.00  41:800x600@75.00  42:800x600@72.19  43:800x600@60.32  44:800x600@56.25  45:720x576@50.00  46:720x480@59.94  47:640x480@75.00  48:640x480@72.81  49:640x480@59.94 
        Geometry: 1920,0 2560x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: Never
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 33% and dimming to 100%
        DDC/CI: allowed
        Color resolution: unknown
        Allow EDR: unsupported
        Sharpness control: unsupported
Comment 3 Konstantin 2025-11-13 20:25:25 UTC
My monitor supports 75Hz in both Windows and Linux KDE Wayland, but recently the 75Hz option has disappeared.
Comment 4 TraceyC 2025-11-13 21:21:12 UTC
Thanks for that information. I'll let the kwin developers reply from here.

Note: In the screenshot, the monitor has a resolution of 2560x1440
Comment 5 Konstantin 2025-11-13 21:46:21 UTC
I have 2 monitors. The main one is 2560*1440x144 Hz and the second one is 1920*1080X75 Hz. The problem with the second monitor is that it cannot be set above 60 Hz.
Comment 6 Zamundaaa 2025-11-14 17:10:17 UTC
KWin doesn't filter out any modes, that's the driver's job. Please report this at https://forums.developer.nvidia.com/c/gpu-graphics/linux