SUMMARY There are several keyboard hotkeys which wor but miss a nice overlay which shows the user that the hotkey worked well. In Ubuntu Gnome they all work perfectly. Tested in Kubuntu 19.10. STEPS TO REPRODUCE 1. Press adjust brightness or volume hotkeys -> they work and show an overlay on the sceen 2. Press bluetooth, airplane mode or keyboard backlight hotkeys -> they also work but there is no overlay OBSERVED RESULT All those hotkeys should show an overlay. Overlay should pop up very fast to avoid pressing the hotkey multiple times. EXPECTED RESULT On y notebook (ThinkPay X1 Extreme G2) most of the hotkeys do not show an overlay as they do in Gnome. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION Don't know if khotkys is the correct piece of KDE. Please move if its wrong here.
Reported this to the Ubuntu bug reporting system, too, as it is likely a Kubuntu configuration bug. https://bugs.launchpad.net/ubuntu/+bug/1857762
I've got the same issue with the keyboard backlight and airplane mode toggle buttons on my keyboard.
Keyboard backlight is Bug 406790; other bug reports will need to be tracked separately as well. Let's use this for the issue where no OSD is shown when toggling Bluetooth. Can you file a new one for the issue with Airplane mode?