Bug 515754 - kcm_kscreen doesn't allow me to create a replica of my TVs or it allows me to create gaps
Summary: kcm_kscreen doesn't allow me to create a replica of my TVs or it allows me to...
Status: REPORTED
Alias: None
Product: systemsettings
Classification: Applications
Component: kcm_kscreen (other bugs)
Version First Reported In: 6.5.91
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: kscreen-bugs-null@kde.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-09 08:55 UTC by Antti Savolainen
Modified: 2026-02-11 02:10 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


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Description Antti Savolainen 2026-02-09 08:55:51 UTC
SUMMARY
Demonstrative video: https://youtu.be/ntZJFm1YHKY
When I first try to create a replica of my TV, first it doesn't register as anything being changed. After cycling through my displays it finally allows me to apply the replica to the TV, but this time it doesn't warn that gaps are not allowd

STEPS TO REPRODUCE 
I'm not entirely sure which part of my setup is responsible for this

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.5.91
KDE Frameworks Version: 6.22.0
Qt Version: 6.11.0
Kernel Version: 6.18.8-arch2-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 2600 Six-Core Processor
Memory: 64 GiB of RAM (62.7 GiB usable)
Graphics Processor: AMD Radeon RX 5700
Comment 1 Antti Savolainen 2026-02-09 08:57:27 UTC
Further comment: Even if I change the the replica to the TV, it actually applies it to the last selected display before selecting the TV
Comment 2 TraceyC 2026-02-10 19:23:12 UTC
Thanks for the bug report. Can you run this before you create the replica of your TV, and paste the output?

kscreen-doctor -o

Thanks.
Comment 3 Antti Savolainen 2026-02-10 19:27:52 UTC
Output: 1 DP-1 ee05d31d-d163-4758-85b5-5a4d0dfc32a6
        enabled
        connected
        priority 1
        DisplayPort
        replication source:0
        Modes:  1:2560x1440@120.00*!  2:2560x1440@99.95  3:2560x1440@59.95  4:1920x1080@60.00  5:1920x1080@60.00  6:1920x1080@59.94  7:1920x1080@50.00  8:1680x1050@59.95  9:1600x900@60.00  10:1280x1024@75.03  11:1280x1024@60.02  12:1440x900@59.89  13:1280x800@59.81  14:1152x864@75.00  15:1280x720@60.00  16:1280x720@60.00  17:1280x720@59.94  18:1280x720@50.00  19:1024x768@75.03  20:1024x768@70.07  21:1024x768@60.00  22:832x624@74.55  23:800x600@75.00  24:800x600@72.19  25:800x600@60.32  26:800x600@56.25  27:720x576@50.00  28:720x480@60.00  29:720x480@59.94  30:640x480@75.00  31:640x480@72.81  32:640x480@66.67  33:640x480@60.00  34:640x480@59.94  35:720x400@70.08  36:1600x1200@59.87  37:1600x1200@119.82  38:1280x1024@119.83  39:1024x768@119.80  40:1920x1200@59.88  41:1920x1200@119.90  42:1280x800@119.85  43:1920x1080@119.93  44:1600x900@119.95  45:1368x768@59.88  46:1368x768@119.83  47:1280x720@119.67 
        Custom modes: None
        Geometry: 2560,444 2560x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: Automatic
        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 100% and dimming to 100%
        DDC/CI: allowed
        Color resolution: automatic (10), range: [8; 16] bits per color
        Allow EDR: unsupported
        Sharpness control: unsupported
        Automatic brightness: unsupported
Output: 2 DP-2 ee707f4b-ebca-420d-8f8b-7760b39b8d7e
        enabled
        connected
        priority 3
        DisplayPort
        replication source:0
        Modes:  48:2560x1440@59.95!  49:2560x1440@143.86  50:2560x1440@119.88  51:2560x1440@89.91*  52:1920x1080@143.85  53:1920x1080@119.98  54:1920x1080@99.92  55:1920x1080@89.90  56:1920x1080@60.00  57:1920x1080@60.00  58:1920x1080@59.94  59:1920x1080@50.00  60:1600x900@89.91  61:1600x900@60.00  62:1280x1024@75.03  63:1152x864@75.00  64:1280x720@89.96  65:1280x720@60.00  66:1280x720@60.00  67:1280x720@59.94  68:1280x720@50.00  69:1440x576@50.00  70:1440x576@50.00  71:1024x768@75.03  72:1024x768@70.07  73:1024x768@60.00  74:1440x480@60.00  75:1440x480@60.00  76:1440x480@59.94  77:1440x480@59.94  78:832x624@74.55  79:800x600@75.00  80:800x600@72.19  81:800x600@60.32  82:800x600@56.25  83:720x576@50.00  84:640x480@75.00  85:640x480@66.67  86:640x480@60.00  87:640x480@59.94  88:720x400@70.08  89:1600x1200@59.87  90:1600x1200@143.72  91:1280x1024@59.90  92:1280x1024@143.67  93:1024x768@143.66  94:1920x1200@59.88  95:1920x1200@143.74  96:1280x800@59.81  97:1280x800@143.84  98:1600x900@143.70  99:1368x768@59.88  100:1368x768@143.61  101:1280x720@143.67 
        Custom modes: None
        Geometry: 0,444 2560x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: Always
        RgbRange: Automatic
        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 100% and dimming to 100%
        DDC/CI: allowed
        Color resolution: automatic (10), range: [8; 16] bits per color
        Allow EDR: unsupported
        Sharpness control: unsupported
        Automatic brightness: unsupported
Output: 3 DP-3 87b4c110-c995-4e5a-af76-a0d31f129880
        enabled
        connected
        priority 4
        DisplayPort
        replication source:0
        Modes:  102:800x480@65.68*! 
        Custom modes: None
        Geometry: 2560,1884 800x480
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: Automatic
        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 100% and dimming to 100%
        Color resolution: automatic (10), range: [8; 16] bits per color
        Allow EDR: unsupported
        Sharpness control: unsupported
        Automatic brightness: unsupported
Output: 4 HDMI-A-1 482bc3f9-bf9b-4bf5-88dd-79ff24b6275d
        enabled
        connected
        priority 2
        HDMI
        replication source:0
        Modes:  103:3840x2160@30.00!  104:4096x2160@60.00  105:4096x2160@59.94  106:4096x2160@50.00  107:4096x2160@24.00  108:4096x2160@23.98  109:3840x2160@60.00*  110:3840x2160@59.94  111:3840x2160@50.00  112:3840x2160@30.00  113:3840x2160@29.97  114:3840x2160@25.00  115:3840x2160@24.00  116:3840x2160@23.98  117:1920x1080@60.00  118:1920x1080@60.00  119:1920x1080@59.94  120:1920x1080@50.00  121:1920x1080@30.00  122:1920x1080@29.97  123:1920x1080@24.00  124:1920x1080@23.98  125:1680x1050@59.88  126:1600x900@60.00  127:1280x1024@60.02  128:1152x864@75.00  129:1280x720@60.00  130:1280x720@60.00  131:1280x720@59.94  132:1280x720@50.00  133:1280x720@30.00  134:1280x720@29.97  135:1280x720@24.00  136:1280x720@23.98  137:1024x768@60.00  138:800x600@60.32  139:720x576@50.00  140:720x576@50.00  141:720x480@60.00  142:720x480@60.00  143:720x480@59.94  144:720x480@59.94  145:640x480@60.00  146:640x480@59.94  147:640x480@59.94  148:1600x1200@59.87  149:2560x1600@59.99  150:1920x1200@59.88  151:1280x800@59.81  152:3200x1800@59.96  153:2880x1620@59.96  154:2560x1440@59.96  155:1368x768@59.88 
        Custom modes: None
        Geometry: 5120,0 3840x2160
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: Automatic
        HDR: enabled
                SDR brightness: 200 nits
                SDR gamut wideness: 0%
                Peak brightness: unknown
                Max average brightness: unknown
                Min brightness: 0 nits
        Wide Color Gamut: enabled
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer accuracy
        Brightness control: supported, set to 100% and dimming to 100%
        Color resolution: automatic (16), range: [8; 16] bits per color
        Allow EDR: unsupported
        Sharpness control: unsupported
        Automatic brightness: unsupported
Comment 4 TraceyC 2026-02-11 02:10:03 UTC
Thanks! The maintainers will take a look from here.