Bug 509230

Summary: Feature request to add HDR only when plugged
Product: [Plasma] kwin Reporter: Marko Jokinen <thephatle>
Component: colour-managementAssignee: KWin default assignee <kwin-bugs-null>
Status: REPORTED ---    
Severity: wishlist CC: nate, plasma-bugs-null, xaver.hugl
Priority: NOR    
Version First Reported In: 6.4.5   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Marko Jokinen 2025-09-07 14:06:21 UTC
HDR is good addon and i used it all the time, but as i started to monitor power usage when HDR is enabled it offcourse takes more power so idea would be enable/disable HDR automatically and detect when plugged in HDR is enabled and when not plugged HDR disabled to save more battery life
Comment 1 Zamundaaa 2025-09-25 19:30:07 UTC
> as i started to monitor power usage when HDR is enabled it offcourse takes more power

Assuming same brightness levels, it really isn't supposed to. Can you elaborate on your setup?
Also please attach the output of
> kscreen-doctor -o
Comment 2 Marko Jokinen 2025-09-26 06:23:23 UTC
(In reply to Zamundaaa from comment #1)
> > as i started to monitor power usage when HDR is enabled it offcourse takes more power
> 
> Assuming same brightness levels, it really isn't supposed to. Can you
> elaborate on your setup?
> Also please attach the output of
> > kscreen-doctor -o

laptop has oled 4k with higher nits than detected, yes i can change those manually with 100%RGB colors and external screen has 500 nits if i remember correctly not oled just led whqd 1440p wih 98% rgb. i used to use prefer color accuracy, but now i reverted to back performance and efficience

´phatle@kinoite:/var/home/phatle$ kscreen-doctor -o
Output: 1 eDP-1 b8f10ce4-ef57-4b48-87a6-8d99a16a7fd6
        disabled
        connected
        priority 0
        Panel
        replication source:0
        Modes:  1:3456x2160@60*!  2:1600x1200@60  3:1600x1200@60  4:1280x1024@60  5:1280x1024@60  6:1024x768@60  7:1024x768@60  8:2560x1600@60  9:2560x1600@60  10:1920x1200@60  11:1920x1200@60  12:1280x800@60  13:1280x800@60  14:3200x1800@60  15:3200x1800@60  16:2880x1620@60  17:2880x1620@60  18:2560x1440@60  19:2560x1440@60  20:1920x1080@60  21:1920x1080@60  22:1600x900@60  23:1600x900@60  24:1368x768@60  25:1368x768@60  26:1280x720@60  27:1280x720@60 
        Geometry: 0,0 2765x1728
        Scale: 1.25
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: Automatic
        HDR: enabled
                SDR brightness: 400 nits
                SDR gamut wideness: 0%
                Peak brightness: 617 nits
                Max average brightness: 400 nits
                Min brightness: 0.0046 nits
        Wide Color Gamut: enabled
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 50% and dimming to 100%
        Color resolution: automatic (10), range: [6; 12] bits per color
        Allow EDR: always
Output: 2 DP-3 448403bb-36fa-43f3-bd55-4fb61386d6aa
        enabled
        connected
        priority 1
        DisplayPort
        replication source:0
        Modes:  28:3440x1440@60*!  29:3440x1440@50  30:3440x1440@30  31:2560x1080@60  32:1920x1080@60  33:1920x1080@60  34:1920x1080@60  35:1920x1080@50  36:1680x1050@60  37:1600x900@60  38:1280x1024@60  39:1280x800@60  40:1152x864@60  41:1280x720@60  42:1280x720@60  43:1280x720@60  44:1280x720@50  45:1024x768@60  46:800x600@60  47:720x576@50  48:720x480@60  49:720x480@60  50:640x480@60  51:640x480@60  52:640x480@60 
        Geometry: 0,0 3440x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: Automatic
        HDR: enabled
                SDR brightness: 295 nits
                SDR gamut wideness: 0%
                Peak brightness: 344 nits
                Max average brightness: 295 nits
                Min brightness: 0.391 nits
        Wide Color Gamut: enabled
        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: [6; 12] bits per color
        Allow EDR: unsupported´
Comment 3 Zamundaaa 2025-09-26 14:31:58 UTC
> i used to use prefer color accuracy, but now i reverted to back performance and efficience
Well, that option can have a big impact on battery life.