application does not respond to MPRIS media keys (effects gnome-based environments)

[aknobloch]

The gnome-settings-daemon intercepts X11 media keys and translates them to a MPRIS D-Bus call. We should be able to register and respond to these via the QtDBUS module, and bind as outlined in the MPRIS specification linked above.

In the meantime, effected GNOME users can disable the gnome-settings-daemon bindings to X11 media keys as outlined below:

1. Install dconf-editor
2. Open dconf-editor and navigate to org.gnome.settings-daemon.plugins.media-keys.
3. Remove the previous-static binding by changing the value to nothing (['']).
4. Repeat the above for pause-static, play-static, stop-static and next-static.
5. If problems persist, look through the settings in step two and validate nothing is bound to suspicious XF86Audio*keys.

[aknobloch]

Clementine audio player has an exhaustive implementation for MPRIS.