On 12/11/2016 7:01 PM, geo.inbox.ignored wrote:
- part 1: clock losing time
first noticed time was off by 8 min, reset via F2 cl terminal.
~40 min later, off by ~2 min, reset via 'service manager' by stopping
ntpd, count 20, started ntpd, within a few seconds, clock reset to
correct time.
~1 hour later, noticed clock off again, considered cause to be cmos
battery failing. after removing ~30 screws and bottom cover, found
that cmos batter was soldered to board. checked with dvom, voltage
read 3.2v with main battery and charger removed.
ran web search on tower box to find that cmos battery is a rechargeable
3.0 v battery and being that removing screws and cover took several
minutes, with battery being up, cause must be elsewhere.
normally, the CMOS clock is just used to set the system time when the
system boots (or wakes up from sleep/hibernate), after that the time is
maintained by the OS via timer interrupts.
my usual solution to time problems is to configure ntpd, but that may
not be suitable for a laptop.
the tzdata is used for time zone offsets, daylight savings time
computations, etc. it should have no impact on the time of day
maintained by the kernel.
--
john r pierce, recycling bits in santa cruz
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