Bug 450172

Summary:	RGB range setting resets to "automatic" when the monitor is plugged in
Product:	[Plasma] KScreen	Reporter:	grouchomarx.fr
Component:	kded	Assignee:	kscreen-bugs-null <kscreen-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	bugseforuns, nate
Priority:	NOR
Version:	5.24.0
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:

Description grouchomarx.fr 2022-02-13 19:53:43 UTC

It is very similar to Bug 442520 (not sure if it is a duplicate).

SUMMARY
I am using a laptop with an external monitor. Its RGB range should be "full" but is incorrectly detected by the automatic algorithm of the Intel driver.
I can set the correct RGB range in the Display settings (Wayland).
But every time I plug back the monitor, the RGB range resets to "automatic".

STEPS TO REPRODUCE
1. plug an external hdmi monitor
2. set its RGB range to "full" in the Display settings
3. unplug the monitor
4. plug in the monitor

OBSERVED RESULT
The RGB range "full" is not applied (low contrast image in my case), and the option is set to "automatic" if I open the Display settings.

EXPECTED RESULT
The RGB range "full" should be applied.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon unstable (neon-unstable-20220206-2353.iso)
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.3

Comment 1 Patrick Silva 2022-02-13 22:44:58 UTC

Possibly duplicate of bug 442520

Comment 2 Nate Graham 2022-02-16 18:00:07 UTC


*** This bug has been marked as a duplicate of bug 442520 ***