#12397 NORM 13.1.0: MIC recording/bias LED flickers in XO-4 runin

Zarro Boogs per Child bugtracker at laptop.org
Tue Jan 22 17:19:07 EST 2013

#12397: MIC recording/bias LED flickers in XO-4 runin
           Reporter:  greenfeld  |       Owner:                                   
               Type:  defect     |      Status:  new                              
           Priority:  normal     |   Milestone:  13.1.0                           
          Component:  kernel     |     Version:  Development build as of this date
         Resolution:             |    Keywords:                                   
        Next_action:  diagnose   |    Verified:  0                                
Deployment_affected:             |   Blockedby:                                   
           Blocking:             |  

Comment(by Quozl):

 This problem always happens with ''aggressive'' timing.

 With ''extreme'' timing the LED is always observed on, and an strace shows
 that arecord is stalled; the SNDRV_PCM_IOCTL_READI_FRAMES ioctl never

 Factory uses normal timing.  So the impact of this ticket is probably that
 runin stops exercising the audio, after the first suspend and resume.

Ticket URL: <http://dev.laptop.org/ticket/12397#comment:4>
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