https://bugs.kde.org/show_bug.cgi?id=495557
Bug ID: 495557
Summary: kscreen-doctor reports RgbRange "unknown" and a peak
brightness of 0 nits for the LG CX
Classification: Plasma
Product: KScreen
Version: 6.2.2
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: kscreen-doctor
Assignee: kscreen-bugs-n...@kde.org
Reporter: bahhz...@duck.com
Target Milestone: ---
Created attachment 175350
--> https://bugs.kde.org/attachment.cgi?id=175350&action=edit
kscreen-doctor -o | ansifilter > kscreen.txt
SUMMARY
kscreen-doctor reports RgbRange "unknown" and a peak brightness of 0 nits for
the LG CX
STEPS TO REPRODUCE
1. navigate to the terminal and run kscreen-doctor -o
OBSERVED RESULT
see attachment
EXPECTED RESULT
RGB range should not be unknown and peak brightness should be greater than 0
nits
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
Operating System: Fedora Linux 41
KDE Plasma Version: 6.2.2
KDE Frameworks Version: 6.7.0
Qt Version: 6.7.2
Kernel Version: 6.11.5-300.fc41.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7800X3D 8-Core Processor
Memory: 30.5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 4090/PCIe/SSE2
ADDITIONAL INFORMATION
Output: 1 HDMI-A-2: refers to the LG CX
Output: 2 DP-3: refers to a Denon x3800H which is plugged in via DP -> HDMI
adapter
The ladder is not plugged into any other device via HDMI passthrough.
Both devices are connected to the same Nvidia 4090 GPU via HDMI + DP ports
modinfo -F version nvidia
565.57.01
Note: It's unlikely that this is issue is exclusive to the 565 beta drivers
I've actually never seen it work properly even with previous stable releases.
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