audio mute doesnt work with external speakers

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http://forums.opensuse.org – i hope this is in the correct sub-forum, and shouldnt be in the laptop sub forum. anyway, the problem.... im on an intel HD audio sound chipset, and the internal speakers work 100% perfect. when i plug in external speakers/headphones, then the volume control works fine, and the internal speakers are also correctly muted. however if i mute the audio with the laptop mute button, then nothing happens. the laptop has LED lit buttons so i know when it's mute/unmuted. its status changes fine. it just doesnt have any affect when external speakers are connected. (Distributions)