clementine ignores on-speaker volume controls

[Lars Noodén]

Clementine uses the built-in keys on the notebook keyboard to mute/unmute, increase or decrease volume. However, it ignores the keys that are built onto the external speakers. Pressing these keys shows a status bar in the the Desktop Environment (Unity) and an audible "pip" but does not affect the actual volume from Clementine. What should happen is that pressing these buttons on the external speakers should affect the volume the same way as the ones on the keyboard. The same buttons work fine in VLC, but not Clementine.

$ lsusb
...
Bus 001 Device 011: ID 046d:0a04 Logitech, Inc. V20 portable speakers (USB powered)
...

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: clementine 1.1.1+dfsg-2ubuntu1
Uname: Linux 3.12.0-031200rc7-generic x86_64
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
Date: Wed Oct 30 12:07:19 2013
InstallationDate: Installed on 2013-10-17 (12 days ago)
InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64+mac (20131016)
MarkForUpload: True
SourcePackage: clementine
UpgradeStatus: No upgrade log present (probably fresh install)