Comment 4 for bug 284319

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Matt Ginzton (matt-ginzton) wrote : Re: mute, brightness buttons on new HP 6930p laptop

The bug about the headphone vs internal speakers is also filed as https://bugs.launchpad.net/bugs/269027. Apparently the snd_hda_intel driver doesn't properly detect the model configuration but knows what to do if you load it with model=mobile.

On my 6930p, the hardware mute switch+LED does work, but at a level that's apparently invisible to (or at least divorced from) Linux's software mixer. It never mutes the headphones, and does mute the internal speakers, and turns itself on at various times when I never told it to.