The brightness resets(or we can say the brightness is lost) to full brightness if there comes a new chat message in skype on the ubuntu-20.04. about brightness

[LordAmit]

Hi @pavanyogi, I am not sure if it is a bug in Brightness Controller or whether we can "fix" it.

Brightness is a shared property that can be accessed by any number of applications e.g., Brightness Controller, Adaptive Brightness of Ubuntu/Linux, Night Shift, f.lux, and looks like Skype too).

If any of the other, aggressive apps choose not to play nice and override existing brightness settings, Brightness Controller really can not gatekeep them away. Sure, we can think of a way that will result in Brightness Controller forcibly setting Brightness every 5 seconds or so, but that'd just result in a tug of war later on with an arbitrary number of applications trying to control Brightness, with unforeseen, unpredictable side effects.

The simpler solution is just to disable the brightness resetting function of the aggressive app instead.

[pavanyogi]

We can possibly give the user the choice to restart the program. As a result, we can choose that menu choice to restart the brightness app whenever the brightness problem arises.

[archisman-panigrahi]

I need to kill the brightness controller application and start it again. Does nothing happen when you change the brightness without closing the app?

[Pavanyogi121]

Yes, brightness control comes back if we change the brightness in the application. I have saved a specific settings as default settings. To get the same settings effect, i prefer to close and relaunch the application instead of changing the brightness level.