I used to replace GTK3 indicator (buggy) with the GTK2 one :
Open with superuser rights the file /usr/share/dbus-1/services/indicator-sound.service
(Mousepad is the default file-editor in Xubuntu, replace it with Gedit or Leafpad if necessary) :
gksu mousepad /usr/share/dbus-1/services/indicator-sound.service
Comment the existing line (comment = add a #
at the beginning of the line) and add this line under (This will load GTK2 indicator if XFCE is running, and GTK3 one for Gnome/Unity/Others) :
Exec=/bin/sh -c 'if [ -n "$(ps -U $USER | grep xfce4-panel)" ]; then /usr/lib/indicator-sound-gtk2/indicator-sound-service;else /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service;fi'
Your file should look like this in the end :
[D-BUS Service]
Name=com.canonical.indicator.sound
#Exec=/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
Exec=/bin/sh -c 'if [ -n "$(ps -U $USER | grep xfce4-panel)" ]; then /usr/lib/indicator-sound-gtk2/indicator-sound-service;else /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service;fi'
You can also try new indicators by installing xfce4-goodies
:
sudo apt-get install xfce4-goodies
Another indicator is, as suggested by landroni, xfce4-mixer
:
sudo apt-get install xfce4-mixer