#11540 NORM 1.75-so: Mute audio output by default in runin

[Zarro Boogs per Child]

#11540: Mute audio output by default in runin
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 Reporter:  greenfeld              |                 Owner:  wad                              
     Type:  enhancement            |                Status:  new                              
 Priority:  normal                 |             Milestone:  1.75-software                    
Component:  manufacturing process  |               Version:  Development build as of this date
 Keywords:                         |           Next_action:  diagnose                         
 Verified:  0                      |   Deployment_affected:                                   
Blockedby:                         |              Blocking:                                   
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 When you have several 1.75 XOs nearby each other, each having started
 runin at a slightly different time, they record & playback 60 seconds of
 audio from what each other has heard.

 This leads to a gradual feedback loop of keyboard typing and startup
 chimes as the default ALSA speaker and master volumes are set to 100%.  If
 XO-1.5's did this, I don't see how the factory put up with the noise
 (unless they used the audio jack).

 To avoid this we should either back off on the audio output level during
 runin, or mute it entirely.

 Seen in 11.3.1 os19/runin 0.16.4-1.

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Ticket URL: <http://dev.laptop.org/ticket/11540>
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