SUMMARY I recently switched from X11 to Wayland and found a regression with the Night Colour filter being applied incorrectly. I run a multi-monitor setup, where I usually turn off my monitor at night (when Night Colour is active). When it is reconnected the next day (when Night Colour is off), the monitor still has the Night Colour filter active. This did not happen under X11. To reset this state, I currently manually toggle Night Colour on and then back off. I also tested the reverse, (disconnect while filter off, reconnect with it on) and it still happens. I assume there is just no check if the filter still applies when the display is reconnected. STEPS TO REPRODUCE 1. Have 2 monitors 2. Turn on Night Colour 3. Disconnect, or disable the second monitor 4. Turn off Night Colour 5. Reconnect the monitor OBSERVED RESULT The reconnected display still has the blue light filter applied, while on the other one it is off EXPECTED RESULT The reconnected display has no blue light filter applied, like on the still connected display. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux, Kernel 6.0.5-arch1-1 (amd64) KDE Plasma Version: 5.26.2 KDE Frameworks Version: 5.99.0 Qt Version: 5.15.6 ADDITIONAL INFORMATION Graphics Platform: Wayland (1.21.0)
Is this still happening with 5.27.8 (or 5.27.9)? We fixed a bunch of night color related issues since your bug report
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Sorry this took me a bit to come back to, with some testing it seems like this is no longer an issue on my end with Plasma 5.27.9. I did encounter another oddity where several times I couldn't re-enable night light until restarting the desktop, after some amount of toggling it in the task bar. But I'll see if I can figure out a way to reproduce this reliably, and file another issue then :>