Plugged in subwoofer and lost all sound

[Wade Smart]

On Mon, Feb 20, 2012 at 14:30, Ric Moore <wayward4now at gmail.com> wrote:
> On 02/20/2012 02:09 PM, Wade Smart wrote:
>>
>> 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.
>
>
> Do alsmixer first. Then the pulse audio pavucontrol second. It should be
> detected. Is that woofer self powered? Or is it just a speaker in an
> enclosure? If the rest of your speakers are self powered (built in amp) then
> the woofer would probably have to be as well ...but I'm guessing there. My
> computer with the MSI motherboard won't auto select it's builtin audio outs
> to pre-amp mode. It's trying to power my speakers like they have no amps and
> buzzes like crazy. POS. No problems with the same surround sound set up with
> my ASUS board. Ric
>
>
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It is self powered.
I unplugged the sub, restarted my computer, chose
Analog Surround 4.1 Output + Analog Stereo Input
and my normal speakers worked again.
However, the sub is not working.

I have a Shuttle pc and some older posts in various
forums say they got theirs running but... it didnt say
how.

In out Sound preferences Output tab for Internal Sound
the settings show a Subwoofer and its set to max through
there is no sound at all.

I installed alsamixer. It doesnt show anything for the sub.
I installed pavucontrol and it crashes almost immediately
with "Connection failed: Connection Terminated". It does
show the sub and its set to 94% default with the other
speakers.

Oh, Im on Ubuntu 10.04.

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