Plugged in subwoofer and lost all sound

[Wade Smart]

A friend gave me his older Altec Lancing subwoofer
after getting a new one. I plugged it into my sub port
but had no sound. I went to Sound Preferences and
under the hardware tab, highlighted my Internal
Audio card and in the Settings for the selected device
below changed from Analog Stereo Duplex to
Analog Surround 5.1 Output + Analog Stereo Input.
Nothing happened. After trying several of the choices
I lost sound all together.

I rebooted and noticed I heard the ubuntu start up
sound. I went back into the Sound Preferences and
under Sound Effects under Sound Theme I changed
from Ubuntu to No sound and back, I can hear the
sounds there. But when you try to play youtube or
or a cd or anything else with sound - there is no
sound at all.

Wade
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Registered Linux User: #480675
Registered Linux Machine: #408606
Linux since June 2005