#11867 HIGH 12.1.0: XO-1.5 - Occasional failure to wake from sleep using rtcwake

Zarro Boogs per Child bugtracker at laptop.org
Mon Jun 18 17:51:59 EDT 2012

#11867: XO-1.5 - Occasional failure to wake from sleep using rtcwake
           Reporter:  Quozl     |       Owner:  pgf                              
               Type:  defect    |      Status:  new                              
           Priority:  high      |   Milestone:  12.1.0                           
          Component:  kernel    |     Version:  Development build as of this date
         Resolution:            |    Keywords:                                   
        Next_action:  diagnose  |    Verified:  0                                
Deployment_affected:            |   Blockedby:                                   
           Blocking:            |  

Comment(by pgf):

 i think i'm reproducing it.

 i notice a lot of these, both in my logs, and the snippets quozl pasted
 hpet1: lost 1 rtc interrupts

 i notice that HPET_EMULATE_RTC is now set in our config, and it wasn't in
 the 2.6.35 kernels.  if this is set, we probably use a pretty different
 hardware mechanism for RTC interrupts.   the relationship between the
 hpet_rtc_xxx() routines and the rtc_cmos code seems somewhat incestuous,
 so i'm not even pretending to understand it right now.  but it's probably
 worth turning that option off.  i can try that, unless someone beats me to

Ticket URL: <http://dev.laptop.org/ticket/11867#comment:13>
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