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

[John Hupp]

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 isbd.net> 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?