Steps to reproduce
- Open an mp3 file using internal viewer
- Try adjusting volume using multimedia keyboard
- Next, make any other window active
- Repeat step 2
Volume doesn't change while the viewer window is in foreground. However, it works if you switch the focus to another window.
Expected results
Volume control should work whether viewer is in foreground or not.
Edit: it turns out the viewer blocks volume control even when the music is played by another application, e.g. iTunes, and the viewer is in text mode.