https://bugs.kde.org/show_bug.cgi?id=497510
Bug ID: 497510
Summary: Weak contrast with HDMI, unless brightness is reduced
to 80%.
Classification: Plasma
Product: kwin
Version: 6.2.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: colour-management
Assignee: kwin-bugs-n...@kde.org
Reporter: pos...@posteo.eu
Target Milestone: ---
Created attachment 176651
--> https://bugs.kde.org/attachment.cgi?id=176651&action=edit
Screenshots
I've temporarily connected my screen (supports 10 bit/c) with an HDMI cable and
I've found that gray colors are not distinguishable from white, unless the
brightness slider in the Brightness and Color applet is put to 80%.
The issue does not appear, when the screen is connected with an DP cable.
There's no ICC profile applied.
Please see phone capture comparison attached.
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20241211
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.1
Kernel Version: 6.11.8-1-default (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 580 Series
inxi -G
```
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Ellesmere [Radeon RX
470/480/570/570X/580/580X/590] driver: amdgpu v: kernel
Display: wayland server: X.org v: 1.21.1.14 with: Xwayland v: 24.1.4
compositor: kwin_wayland driver: X: loaded: amdgpu
unloaded: modesetting,vesa dri: radeonsi gpu: amdgpu resolution: 1920x1080
API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
platforms: gbm,wayland,x11,surfaceless,device
API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.3.1 renderer: AMD
Radeon RX 580 Series (radeonsi polaris10 LLVM 19.1.5 DRM 3.59
6.11.8-1-default)
```
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