Volume indicator in XFCE panel shows as muted

[Angel de Vicente]

Testing Ubuntu-Studio 13.10.

The volume indicator in the XFCE panel shows as muted, despite the fact that I can lower it or make it higher via the keyboard keys or the PulseAudio Volume Control, and actually I have no problems listening to audio. But the volume indicator always remains as if muted.

ubuntu-studio@ubuntu-studio:~$ lsb_release -d
Description: Ubuntu 13.10

ubuntu-studio@ubuntu-studio:~$ apt-cache policy xfce4-panel
xfce4-panel:
  Installed: 4.10.1-1ubuntu1
  Candidate: 4.10.1-1ubuntu1
  Version table:
 *** 4.10.1-1ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ saucy/universe i386 Packages
        100 /var/lib/dpkg/status
W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ saucy/universe i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ saucy/multiverse i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_multiverse_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
ubuntu-studio@ubuntu-studio:~$

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xfce4-panel 4.10.1-1ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-11.4-lowlatency 3.11.3
Uname: Linux 3.11.0-11-lowlatency i686
ApportVersion: 2.12.5-0ubuntu2
Architecture: i386
CasperVersion: 1.336ubuntu1
Date: Wed Oct 16 10:45:43 2013
ExecutablePath: /usr/bin/xfce4-panel
LiveMediaBuild: Ubuntu-Studio 13.10 "Saucy Salamander" - Release i386 (20131015)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xfce4-panel
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.