Bug 422519

Summary:	Gamma correction doesn't show up at restart.
Product:	[Applications] systemsettings	Reporter:	Masacroso <masacroso>
Component:	kcm_kgamma	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	REPORTED ---
Severity:	normal	CC:	brokencanoe, email202004, kde
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=300712
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Masacroso 2020-06-06 06:48:06 UTC

SUMMARY


STEPS TO REPRODUCE
1. Change the gamma in System Preferences > Screen & Monitor > Gamma
2. Save the configuration
3. Reboot the PC

OBSERVED RESULT

At the startup of the system your corrections are not active, to activate you need to go manually to the screen of gamma settings, then the corrections show up.

EXPECTED RESULT

The gamma corrections start automatically with the system.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

I dont have any night mode or custom color installed. There is a bug that says that this happen because a conflict with night mode, but I dont have a night mode or so.

The so-called bug is this:

https://bugs.kde.org/show_bug.cgi?id=413134

Comment 1 Canoe 2021-02-18 10:40:55 UTC

This is also confirmed as present in Plasma 5.21

1) Set Gamma in System Preferences. 
2) Reboot
3) Gamma will not return to the correct settings until you physically go back into the Gamma page of System Prefs. (Resuming from sleep doesn't have this bug).

KDE Plasma Version : 5.21.0
KDE Frameworks Version : 5.79.0
Qt : 5.15.2

Comment 2 David Edmundson 2021-02-18 11:53:00 UTC

> but I dont have a night mode or so.


It's packaged as part of kwin. In a recent for-nightmode fix we force apply what we think the state should be on bootup.

I can believe this is a manifiestation of that.

Maybe the fastest fix is to port kgamma to talk to kwin instead of doing it's own thing so we have a central source of truth.

Comment 3 Canoe 2021-02-24 09:27:47 UTC

As per comment 1, this bug is still present in 5.21.1, no workarounds found other than to manually enter gamma settings on every reboot.

Comment 4 email202004 2023-09-25 08:57:38 UTC

The bug is still present in 5.27.8.