Toshiba Laptop P105 S921 - No Audio

[enchance]

The problem may lie with your audio settings and not your laptop since Alsamixer is already being detected. Do the ff:

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$ aplay -l

This lists all your detected soundcards. What you're looking for is the card # of your main soundcard. For example, this is what came out from my laptop:

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card 0: IXP [ATI IXP], device 0: ATI IXP AC97 [ATI IXP AC97]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Modem [ATI IXP Modem], device 0: ATI IXP MC97 [ATI IXP MC97]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Here my main card is located in card 0 since the other one is my modem card. Once you know that, edit alsamixer by typing

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$ alsamixer

You'll have several options here which all correspond to your audio settings. What you need to do is make sure that External Amplifier is muted and PCM and Line Jack is not muted. Press "m" to mute/unmute. You'll have to scroll to the right by pressing the right arrow key to see them. As for the rest you can customize them any way you want.

Once that's done, run

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$ sudo alsactl store 0

This basically stores your settings for the next time you boot up. This method also works for ASUS laptops which don't have sound OOTB.

[enchance]

Your alsamixer looked somewhat ok. Use this thread instead to fix your audio problems http://ubuntuforums.org/showthread.php? ... ions+guide