Bug 489825

Summary: RGB range option help text isn't 100% accurate
Product: [Applications] systemsettings Reporter: Karl Ove Hufthammer <karl>
Component: kcm_kscreenAssignee: kscreen-bugs-null <kscreen-bugs-null>
Status: CONFIRMED ---    
Severity: minor CC: nate, plasma-bugs-null, xaver.hugl
Priority: NOR Keywords: usability
Version First Reported In: 6.1.1   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Karl Ove Hufthammer 2024-07-06 11:45:37 UTC
SUMMARY
I can’t seem to find this string in the UI (there’s no longer a ‘RGB range’ option in the kscreen KCM in Plasma 6.1.1?), but I’m translating kscreen KCM, and found this string explaining the ‘RGB range’ option:

  Determines whether or not the range of possible color values needs to be limited for the display.
  This should only be changed if the colors on the screen look washed out.

First, whether an option should ‘only be changed’ depends on which value it is *currently* set to. So this part of the string doesn’t really make sense.

Second, the assumption that it should only be changed if the colours look washed out, isn’t true. I have my system connected to a TV, and I need to change range to ‘Limited’ because the the (darker) greys are crushed to black, which is the opposite of the colours being ‘washed out’. (On the other hand, if I had a computer monitor connected, having the option set to ‘Limited’ *would* probably result in washed out colours.)


The point is that the correct setting depends on the output source, and having the wrong value can result in *either* crushed blacks (lost detail in darker areas) or washed out colours (dark colours turning lighter), *depending* on the (properties of the) output hardware / screen.


SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20240703
KDE Plasma Version: 6.1.1
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
Kernel Version: 6.9.7-1-default (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-2500 CPU @ 3.30GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1060 3GB/PCIe/SSE2
Manufacturer: MSI
Product Name: MS-7673
System Version: 1.0