https://bugs.kde.org/show_bug.cgi?id=459481

            Bug ID: 459481
           Summary: Redshift (night colour) is not activated on all
                    screens at startup
    Classification: Plasma
           Product: plasma-redshift-control
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: General
          Assignee: plasma-b...@kde.org
          Reporter: ilario.gottarde...@gmail.com
  Target Milestone: ---

SUMMARY
In my dual gpu system (integrated intel / discrete nvidia) if I turn on the
computer at evening, redshift is activated only on the monitor attached to the
intel gpu. The two monitors attached to the nvidia card displays normal
colours. To turn them on, I have to manually go to settings, disable redshift
and then enabled it; that will turn it on on every monitor.

STEPS TO REPRODUCE
1. Turn on pc at night and log into plasma
2. Observe that redshift is enabled only on the intel-attahed monitor
3. Go to settings, disable it and then enabled it, to turn it on on every
monitor.

OBSERVED RESULT
Redshift is enabled only on one monitor, which is the principal monitor per
BIOS settings

EXPECTED RESULT
Redshift should be automatically enabled on all monitors

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
Graphics Platform: X11

ADDITIONAL INFORMATION
nvidia card use proprietary drivers. This bug is present since at least one
year or two

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