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[Problem] SFOS - After removing the battery for doing a reset the clock shows the wrong time [answered]

asked 2016-04-13 16:17:32 +0300

megalith gravatar image

updated 2016-04-20 13:21:56 +0300

Problem Statement: After removing the battery for doing a reset the clock shows the wrong time.

Confirm the solution and the explanation below.

Thank you very much.


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The question has been closed for the following reason "the question is answered, an answer was accepted" by raketti
close date 2016-04-14 09:13:06.942916



Isn't this the expected behaviour? I remember most phones lost date/time/region settings after a while when the battery was taken out. Sometime I had to go throught he whole setup-process on other phones after pulling the battery.

ossi1967 ( 2016-04-13 17:30:58 +0300 )edit

I think this question is connected to this one, which is why I think they should better be joined. And right, removing electricity from the timer unit resets time and date like with all computers.

lakutalo ( 2016-04-13 18:01:43 +0300 )edit

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answered 2016-04-13 21:01:58 +0300

spiiroin gravatar image

When the device boots up, system time is taken from max(rtc_time, release_time, last_shutdown_time).

When device is shut down, system time is stored to rtc and last_shutdown_time (=file).

If battery is yanked out without doing a orderly shutdown -> shutdown time is not recorded, and rtc remains as set in the previous shutdown + some drifting - which may or may not be close to correct time.

If the battery is kept detached long enough (few minutes), rtc time will be reset -> on bootup system time gets set back to release time stamp / last recorded shutdown time.

If the wrong time does not get corrected soon after bootup is finished, it is different problem domain.

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Asked: 2016-04-13 16:17:32 +0300

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Last updated: Apr 20 '16