Bug 499804 - The brightness on the monitor is not adjustable
Summary: The brightness on the monitor is not adjustable
Status: RESOLVED FIXED
Alias: None
Product: plasmashell
Classification: Plasma
Component: Brightness and Color widget (show other bugs)
Version: 6.2.5
Platform: Arch Linux Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-02-11 09:45 UTC by ilyavolkovpl
Modified: 2025-02-12 04:20 UTC (History)
2 users (show)

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Version Fixed In:
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Description ilyavolkovpl 2025-02-11 09:45:43 UTC 
I need help with an issue regarding brightness adjustment. I have three monitors, but I can only adjust the brightness on monitor 2. When I try to reduce the brightness on the third monitor, it goes to zero, and I have to use the monitor's physical buttons to correct it. However, the problem persists after rebooting. I am using Plasma 6.2.5 on Wayland.

Linux/KDE Plasma:  arch 
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version:  6.8.2

ADDITIONAL INFORMATION
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
Kernel Version: 6.13.2-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800U with Radeon Graphics
Memory: 30.7 GiB RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: HP
Product Name: HP ProBook 455 G8 Notebook PC
Comment 1 ilyavolkovpl 2025-02-11 09:52:54 UTC 
Output: 1 eDP-1
        enabled
        connected
        priority 2
        Panel
        Modes:  1:1920x1080@60*!  2:1680x1050@60  3:1280x1024@60  4:1440x900@60  5:1280x800@60  6:1280x720@60  7:1024x768@60  8:800x600@60  9:640x480@60  10:1280x1024@60  11:1024x768@60  12:1280x800@60  13:1920x1080@60  14:1600x900@60  15:1368x768@60  16:1280x720@60 
        Geometry: 1080,1548 1536x864
        Scale: 1.25
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Brightness control: supported, set to 100%
Output: 2 DP-1
        enabled
        connected
        priority 1
        DisplayPort
        Modes:  17:1920x1080@60!  18:1920x1080@75*  19:1920x1080@60  20:1920x1080@60  21:1920x1080@50  22:1680x1050@60  23:1280x1024@75  24:1280x1024@60  25:1440x900@60  26:1280x960@60  27:1280x800@60  28:1280x720@60  29:1280x720@60  30:1280x720@60  31:1280x720@60  32:1280x720@50  33:1024x768@75  34:1024x768@70  35:1024x768@60  36:832x624@75  37:800x600@75  38:800x600@72  39:800x600@60  40:800x600@56  41:720x480@60  42:720x480@60  43:720x480@60  44:720x480@60  45:640x480@75  46:640x480@73  47:640x480@67  48:640x480@60  49:640x480@60  50:640x480@60  51:720x400@70  52:1280x1024@60  53:1024x768@60  54:1280x800@60  55:1920x1080@60  56:1600x900@60  57:1368x768@60  58:1280x720@60 
        Geometry: 1080,468 1920x1080
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Brightness control: supported, set to 100%
Output: 3 HDMI-A-1
        enabled
        connected
        priority 3
        HDMI
        Modes:  59:1920x1080@60*!  60:1920x1080@60  61:1920x1080@60  62:1920x1080@50  63:1600x1200@60  64:1680x1050@60  65:1400x1050@60  66:1600x900@60  67:1280x1024@75  68:1280x1024@60  69:1440x900@60  70:1280x960@60  71:1280x800@60  72:1152x864@75  73:1280x720@60  74:1280x720@60  75:1280x720@60  76:1280x720@50  77:1440x576@50  78:1440x576@50  79:1024x768@75  80:1024x768@70  81:1024x768@60  82:832x624@75  83:800x600@75  84:800x600@72  85:800x600@60  86:800x600@56  87:720x576@50  88:720x576@50  89:720x576@50  90:720x480@60  91:720x480@60  92:720x480@60  93:720x480@60  94:720x480@60  95:640x480@75  96:640x480@73  97:640x480@67  98:640x480@60  99:640x480@60  100:640x480@60  101:720x400@70  102:1280x1024@60  103:1024x768@60  104:1280x800@60  105:1920x1080@60  106:1600x900@60  107:1368x768@60  108:1280x720@60 
        Geometry: 0,0 1080x1920
        Scale: 1
        Rotation: 8
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Brightness control: unsupported
Comment 2 ilyavolkovpl 2025-02-11 10:02:37 UTC 
ViewSonic Brightness control  unsupported, but set zero on start system.
Comment 3 ilyavolkovpl 2025-02-12 04:20:43 UTC 
systemctl --user restart plasma-powerdevil.service