Comment 26 for bug 426116

I found a solution here: http://ubuntuforums.org/showthread.php?t=452992
as toshiba satellite a135-s2386 have the same sound hardware this will work

here the solution if for some reason the site is down:

go to the terminal and:
sudo gedit /etc/modprobe.d/alsa-base.conf

then put this at the bottom:

options snd-hda-intel probe_mask=8 model=3stack

after that kill pulseaudio with this:

killall pulseaudio

after that restart pulse audio:

sudo alsa force-reload

and finally do aplay -l should have something like this:

adamtheo@laptop-satellite:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 6: Si3054 Modem [Si3054 Modem]
Subdevices: 1/1
Subdevice #0: subdevice #0

i guess this may help a lot of people here