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No sound from LFE speaker in Acer laptop

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linux-howto

http://askubuntu.com – My laptop (Acer Aspire 7738g) has two front speakers and left speaker, but as default sound come only from front speakers. When I change in /etc/modprobe.d/alsa-base.conf the following line: options snd-hda-intel model=acer-aspire-6530g Left speaker is working, but only left channel is played on it. This would be enough, but internal microphone and auto muting speakers when headphones are present stops working, which is strange, because that was working on previous version of Ubuntu. I can also change with this: options snd-hda-intel model=acer-aspire-7730g And when I chose (HowTos)