#10999 NORM Not Tri: XO-1.75 A3 idt1338 chip loses oscillator over laptop power cycle

Zarro Boogs per Child bugtracker at laptop.org
Tue Jun 14 00:41:44 EDT 2011


#10999: XO-1.75 A3 idt1338 chip loses oscillator over laptop power cycle
--------------------------+-------------------------------------------------
 Reporter:  Quozl         |                 Owner:               
     Type:  defect        |                Status:  new          
 Priority:  normal        |             Milestone:  Not Triaged  
Component:  not assigned  |               Version:  not specified
 Keywords:                |           Next_action:  never set    
 Verified:  0             |   Deployment_affected:               
Blockedby:                |              Blocking:               
--------------------------+-------------------------------------------------
 Method:

  * start OpenFirmware and stop at ok prompt,

  * query the oscillator stop flag of the idt1338 chip,
 {{{
 dev /rtc 7 rtc@ 20 and .
 }}}
  and expect result ''20'', which means the bit is set,

  * clear the bit,
 {{{
 7 rtc@ 20 xor 7 rtc!
 }}}

  * check the bit,
 {{{
 7 rtc@ 20 and .
 }}}
  and expect result ''0'', which means the bit is cleared,

  * reboot with
 {{{
 reboot
 }}}
  and again obtain the ok prompt,

  * check the bit,
 {{{
 dev /rtc 7 rtc@ 20 and .
 }}}
  and expect result ''0'', which means the RTC oscillator was not stopped
 by the reboot, a nominal finding,

  * power off with
 {{{
 power-off
 }}}
  then use the power button to turn the laptop back on,

  * check the bit,
 {{{
 dev /rtc 7 rtc@ 20 and .
 }}}

 Expected result: 0.

 Observed result: 20, an abnormal finding indicating that the RTC
 oscillator was stopped by the power cycle.

-- 
Ticket URL: <http://dev.laptop.org/ticket/10999>
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