System:

Arch Linux

KDE Plasma 6

Wayland

iMac 2017

Lumux 0.6.0 (tested both Flatpak and latest GitHub source)

What works:

Philips Hue Bridge connects successfully

Entertainment zones are detected

Reading Mode works and changes Hue lights correctly

Screen selection dialog appears

Screen thumbnail is visible in the KDE sharing dialog

Sync starts successfully

FPS shows around 10

Problem:After selecting the screen, the Lumux preview remains completely black.Hue lights do not react to screen content.

Additional information:

xdg-desktop-portal is running

xdg-desktop-portal-kde is installed

PipeWire is running correctly

Same behavior with Flatpak version and GitHub source version

Expected behavior:The preview should show screen content and Hue lights should react to the displayed video.

Actual behavior:Preview remains black while FPS continues updating.

Additional test:

I reinstalled Lumux, rebooted the system and tested again.

Result:

Screen selection works
Sync starts
FPS stays around 10
Reading Mode works
Hue Entertainment connection works
Preview remains completely black
Lights do not react to screen content

So the problem is still present after a clean reinstall and reboot.