[Bug 90341] Sound is displayed as mute after suspend/resume whereas it is not

[Huygens]

Public bug reported:

Binary package hint: gnome

This apply more specifically to the Gnome Volume Control applet that is displayed by default near the date&time in the top bar of the Gnome Desktop. The version of this applet is 2.17.90.
The problem is minor and cosmetic only. It occurs after the following sequence of event: suspend & resume.
After, resume the session is locked, when I unlock it using my user password, I get the desktop back. The volume applet shows the sound as muted (whereas it was not in this state before suspend).
However, it is not muted, I can hear sounds.
To come back to normal is pretty easy. A press on the mute sound special key of my keyboard and the sound is now really muted (the display stay unchanged). A second pressure on the same key brings back the sound to not muted and the display is then correct.
This bug is reported after the test performed on Dell Latitude D600 (cf. https://wiki.ubuntu.com/LaptopTestingTeam/DellLatitudeD600)

** Affects: meta-gnome2 (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

** Tags added: acpi resume sleep sound suspend

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Sound is displayed as mute after suspend/resume whereas it is not
https://launchpad.net/bugs/90341