Bug 426121 - Nightlight turns off when launching Nvidia X Settings
Summary: Nightlight turns off when launching Nvidia X Settings
Status: RESOLVED DUPLICATE of bug 413134
Alias: None
Product: systemsettings
Classification: Applications
Component: kcm_nightcolor (show other bugs)
Version: 5.19.5
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-09-02 20:49 UTC by Viko
Modified: 2020-09-28 10:34 UTC (History)
1 user (show)

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Description Viko 2020-09-02 20:49:31 UTC 
SUMMARY
Nightlight turns off when launching Nvidia X Settings. The option is still toggled on, but night color doesn't work anymore. To fix it, you need to disable the night color(animation from the chosen color to normal does happen/occur) and re-enable it. Every opening of the NVIDIA X Server Settings causes the Night Color to stop working until re-enabled.

STEPS TO REPRODUCE
1. Turn on Night Color
2. Open application NVIDIA X Server Settings

OBSERVED RESULT
- Night Color turns off

EXPECTED RESULT
- None

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux x86_64(last update 02.09.2020)
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.19
Qt Version: 
- QMake version 3.1
- Using Qt version 5.15.0 in /usr/lib

ADDITIONAL INFORMATION
NVIDIA Driver Version: 450.66
Comment 1 Christoph Feck 2020-09-28 10:34:26 UTC 
The nvidia-settings tool resets the X11 gamma ramps even if you didn't configure any gamma curve related settings in the tool. That's a bug that you could report to NVIDIA developers.

Additionally, X11 unfortunately has no way to cascade gamma curves, so each tool replaces the gamma curve settings of each other tool.

*** This bug has been marked as a duplicate of bug 413134 ***