[Bug 543086] [NEW] Lenovo Yxx0 disabled sound indicator not work

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Binary package hint: kubuntu-desktop

I have Lenovo Y550-4CWI laptop but as I know this issue releated to all Lenovo Yxx0 laptops.
My "disable sound" hardware button have a led-indicator. This  idicator work in Windows, but always not light in Kubunt (I not tried it, but probably in Ubuntu too).
Photo of this button and hardware information attached.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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Lenovo Yxx0 disabled sound indicator not work
https://bugs.launchpad.net/bugs/543086
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