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After a clean install of Ubuntu 12.04 on my Dell Inspiron 6400n Laptop there is no sound on any application I use apart from the log in screen ready noise. If I click on the speaker icon on the top panel then sound settings it tells me that the default playback device is S/PDIF. In alsamixer the slider is set to zero. I am sure it should be HDA intel or similar. How can I get the sound working please...?

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I removed alsa-hda-dkms (alsa-hda-dkms 0.201205021650~precise1) and rebooted. Sound is back.

  • So you went, sudo apt-get remove alsa-hda-dkms? I'm having the same problem – Fawkes5 May 9 '12 at 21:09
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i met this problem before, after update.. Try this may help:

open terminal and then edit

sudo cat /etc/default/speech-dispatcher

#Set to yes to start system wide Speech Dispatcher

RUN=no 

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