Plugged in subwoofer and lost all sound

Wade Smart wadesmart at
Mon Feb 20 21:23:08 UTC 2012

On Mon, Feb 20, 2012 at 14:51, Wade Smart <wadesmart at> wrote:
> On Mon, Feb 20, 2012 at 14:30, Ric Moore <wayward4now at> 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.
> --
> Registered Linux User: #480675
> Registered Linux Machine: #408606
> Linux since June 2005

After that error was produced I lost sound and couldnt get it
going again so I rebooted and its now working but without the
sub still.

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

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