I am pretty sure i have already seen some settings for the configuration of the OSD popups, like - audio volume (using media keys) - brightness (using hardware keys) - mic on/off etc. There had been options for the size of the OSD and the time it was shown before it faded away. I was looking through (hopefully) all systemsettings entries and investigated in every option to kcmshell4 and kcmshell5.... but it's gone... Am i missing something or has it disappeared in 5.7.x ? Any hint would be appreciated :-) Reproducible: Always
maybe helpful: the computer i was referring to (media/hardware keys) is a lenovo laptop t420. I am using the fn-<key> keys or the special media keys of this machine for the osd popups to appear.
Those options never existed. I just checked the OSD code logs, and it never loaded anything from a config. I'm not quite sure what you might be thinking of. If you have any specific bugs regarding OSDs please reopen this with some extra info as to what exactly is problematic.