#12798 NORM 13.2.0-: Screenshot does not take every time

Zarro Boogs per Child bugtracker at laptop.org
Fri Jun 27 01:19:32 EDT 2014

#12798: Screenshot does not take every time
           Reporter:  tonyforster  |       Owner:  suyouxin                         
               Type:  defect       |      Status:  new                              
           Priority:  normal       |   Milestone:  13.2.0-android                   
          Component:  android      |     Version:  Development build as of this date
         Resolution:               |    Keywords:                                   
        Next_action:  design       |    Verified:  0                                
Deployment_affected:               |   Blockedby:                                   
           Blocking:               |  

Comment(by suyouxin):

 As the code said in Android

 // Time to volume and power must be pressed within this interval of each
 private static final long SCREENSHOT_CHORD_DEBOUNCE_DELAY_MILLIS = 150;

 Could be either X or power in front if within 150ms.

 So that if we ignore these transfer cost between cpus and kernel to
 android as Quozl comments. And apply pgf's data "60ms generate X and 150ms
 generate power", In this case:

        Press X 61ms early than power.        not trigger
        Press X 60ms early than power.        trigger
        Press X 60ms and power some time.     trigger
        Press power 90ms early than X.        trigger
        Press power 240ms early than X.       trigger
        Press power 241ms early than X.       not trigger

 So that if you press power button little bit early will increase the
 successful of trigger screenshot taken.

Ticket URL: <http://dev.laptop.org/ticket/12798#comment:12>
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