[Bug 58751] Mute Key showing OSD but is not working

[BenjaminKoenig]

Public bug reported:

I am using Kubuntu Edgy on a Nexoc ES606 laptop.
FN+F3 gives me a OSD which says that sound is muted but it has no effect.
All the other FN keys are working just fine.

Output of xev, Mute Key pressed:
KeyRelease event, serial 28, synthetic NO, window 0x2600001,
    root 0x5d, subw 0x0, time 1966259779, (586,763), root:(589,790),
    state 0x0, keycode 160 (keysym 0x1008ff12, XF86AudioMute), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False

sudo dmidecode --type system:
System Information
        Manufacturer: American Megatrends Inc
        Product Name: 255/259 Series
        Version:

** Affects: kdeutils (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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Mute Key showing OSD but is not working
https://launchpad.net/bugs/58751