[tz] If you lie about the time zone, your iPhone will have its revenge

Random832 random832 at fastmail.com
Wed Jan 20 12:29:49 UTC 2016

Guy Harris <guy at alum.mit.edu> writes:
> Waking up once a second *iff* the display is on (if it's off, there's
> no point in updating the blacked-out battery charge level)

Well, I'd read your "check every second" as implying logic that depends
on checking it at fixed intervals, so whether the display is on or
off. Otherwise you've got to store the timestamp of the last check (or
of a longer-ago check, to get a smoother average) and subtract it from
the current one... which this bug is apparently a result of such
subtraction being done in local time.

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