Hmm, I think this patch will help. ** Patch added: "0001-ALSA-HDA-Pinfix-quirk-for-HP-Z200-Workstation.patch" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/754964/+attachment/2177857/+files/0001-ALSA-HDA-Pinfix-quirk-for-HP-Z200-Workstation.patch
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