Toshiba Satellite M115 sound issue in Ubuntu 12.04 LTS

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http://askubuntu.com – I have seen similar problems on this site and on others, and I have tried all sorts of solutions posted, but so far non have worked. I have a Toshiba Satellite M115-S1061 that came with Windows XP. I want to learn Linux so I installed Ubuntu 12.04 LTS and the sound isn't not working correctly. It worked fine on Windows XP beforehand. I have also tried Linux Mint on this machine with the same results. I can very faintly hear sound if I plug in headphones, but nothing comes out of the speakers. When I open the Sound Settings, there is nothing listed in the Play Through box under the Output Tab. (HowTos)