#12704 NORM Not Tri: [CL4]The power LED will keep turn on about 30 secs in S3 mode.Fail rate:1/6 times

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#12704: [CL4]The power LED will keep turn on about 30 secs in S3 mode.Fail rate:1/6
times
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           Reporter:  james         |       Owner:  pgf          
               Type:  defect        |      Status:  new          
           Priority:  normal        |   Milestone:  Not Triaged  
          Component:  not assigned  |     Version:  not specified
         Resolution:                |    Keywords:               
        Next_action:  never set     |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:                |  
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Changes (by pgf):

 * cc: wad (added)


Comment:

 getting back to the original problem desciption:  after the system sleeps
 initially (e.g., with lid close) what we're seeing is an AC wakeup
 followed by an immediate attempt to suspend.  the suspend takes a very
 long time to complete:
 {{{
 ...
 [   86.723257] mmc0: dropping power over suspend
 [   86.727779] [galcore] enter gpu_suspend
 [   86.735926] [galcore] exit gpu_suspend, return 0
 [   86.740557] MARK:776 olpc_bat_suspend()
 [   86.744361] MARK:786 olpc_bat_suspend()
 [   86.744373] MARK:213 olpc_ec_disable_wakeup() 'olpc_ec->wakeup_mask' is
 0xf9fd
 [   86.755394] PM: suspend of devices complete after 1200.075 msecs
 [   86.761357] MARK:1170 olpc_ec_1_75_suspend() 'ec->wakeup_mask' is
 0xf9fd
 [   86.802399] PM: late suspend of devices complete after 46.998 msecs
 [   86.808885] PM: noirq suspend of devices complete after 6.474 msecs
 [   86.815229] mmp3_pm_enter_d2
 [   86.815249] before suspend

    [ at this point, the power LED remained lit for 20 to 25 seconds. ]
 }}}

 the corresponding EC trace is:
 {{{
 event mask was 0xf9fd, is now 0xffff
 event mask was 0xffff, is now 0xf9fd
 504605:suspend_hint --> 1
 suspend sync: 0000000a

   [ long delay occurs here ]

 524889:...zzzzz ACR: 5745 SOC: 87
 before:
 savedWUEN[1] = 8
 WUEN[1] = 8
 WUEN[2] = 10
 WUEN[6] = 10
 WUEN[7] = 10
 savedWUEN[9] = 44
 WUEN[9] = 44
 savedWUEN[13] = 20

 }}}


 this implies that either the VCXO_EN signal is staying high much longer
 than we're expecting it to, or the EC isn't recognizing the transition.

 i'll figure out which is happening, next.

-- 
Ticket URL: <http://dev.laptop.org/ticket/12704#comment:4>
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