No sound on 12.10 installation on Acer Revo - how to get some?

Chris Green cl at
Sat Dec 29 17:55:02 UTC 2012

On Sat, Dec 29, 2012 at 12:42:57PM -0500, John Hupp wrote:
> On 12/29/2012 12:28 PM, Chris Green wrote:
> >On Sat, Dec 29, 2012 at 07:23:11PM +0200, Ioannis Vranos wrote:
> >>On Sat, Dec 29, 2012 at 7:19 PM, Chris Green <cl at> wrote:
> >>>I am having trouble getting any sound output on an Acer Revo R3600.
> >>>
> >>>I first tried after upgrading an Ubuntu Server installation to 12.10,
> >>>that produced nothing.
> >>>
> >>>I have now done a completely fresh install of Lubuntu core and that is
> >>>just as silent.
> >>>
> >>>Everything *appears* to work, e.g. if I run alsamixer on the command
> >>>line I get all the expected bits and can turn the gain up on 'master',
> >>>'phones' and 'speaker' but still I get nothing out.
> >>>
> >>>If I run the default rhythmbox it thinks everything is OK and 'plays'
> >>>but no sound comes from the speakers (I'm using the headphone output
> >>>driving an amplifier).  Jiggling the connections produces a crackle from
> >>>the speakers so they are connected and live.
> >>>
> >>>Can anyone suggest what might be wrong?
> >>
> >>Why are you using Ubuntu Server and Lubuntu core, and not the normal
> >>Lubuntu Desktop installation?
> >>
> >Because this is to be a server system running headless, among other
> >things I'm aiming to run mpd on it.
> >
> >I only tried Lubuntu Core because I wondered if my problem was some GUI
> >component that was necessary to make sound work (it shouldn't be so but
> >you never know).  If/when I get it working I will probably remove the
> >GUI or least stop it running.
> >
> I see you're using the headphone output.  Does it also have a
> regular speaker output (usually green) on the back of the machine
> that you can try?
Aaaarrrrggggghhhhhh!!!!!!!!  :-)

I had misread the silly icons by the sockets and had the connection to
the amplifier plugged into the Mic Input!

Sorry all, it works perfectly now!  What a waste of half a day!

Chris Green

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