#10757 NORM Not Tri: XO-1.5 system time failed to adjust forward by rtcwake period

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#10757: XO-1.5 system time failed to adjust forward by rtcwake period
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           Reporter:  Quozl         |       Owner:               
               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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Comment(by Quozl):

 Been testing for a few hours.  I was able to reproduce a different
 symptom; system time failed to adjust forward over a power button suspend,
 because the kernel reads all zeros from the RTC during resume.  It might
 explain the rtcwake symptom.

 {{{
 [ 3668.441389] olpc-pm-1.5: wakeup_source is 'power button'
 [ 3668.441389] Back to C!
 [ 3668.441389] timekeeping_resume, xtime=1300331436
 [ 3668.441389] mach_get_cmos_time
 [ 3668.441389] rtc_cmos_read: write a to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] rtc_cmos_read: write 0 to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] rtc_cmos_read: write 2 to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] rtc_cmos_read: write 4 to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] rtc_cmos_read: write 7 to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] rtc_cmos_read: write 8 to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] rtc_cmos_read: write 9 to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] time: 0 0 0 0 0 0 0
 [ 3668.441389] rtc_cmos_read: write b to 70
 [ 3668.441389] rtc_cmos_read: read 0 from 71
 [ 3668.441389] now = 943920000
 [ 3668.441389] not incrementing xtime
 [ 3668.475979] ACPI: Waking up from system sleep state S3
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/10757#comment:9>
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