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Date:      Fri, 07 Feb 2014 01:55:03 +1030
From:      Wayne Sierke <ws@au.dyndns.ws>
To:        Christian Weisgerber <naddy@mips.inka.de>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Invalid time in real time clock
Message-ID:  <1391700303.2036.32.camel@predator-ii.buffyverse>
In-Reply-To: <lclnst$1fu$1@lorvorc.mips.inka.de>
References:  <lcj2jj$2bu$1@lorvorc.mips.inka.de> <lcjpn2$1a07$1@lorvorc.mips.inka.de>  <lclnst$1fu$1@lorvorc.mips.inka.de>

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On Sun, 2014-02-02 at 15:23 +0000, Christian Weisgerber wrote:
> Christian Weisgerber <naddy@mips.inka.de> wrote:
> 
> > > atrtc0: WARNING: Battery failure indication
> > > Invalid time in real time clock.
> > > Check and reset the date immediately!
> > > 
> > > Incongruously, the RTC time is actually correct.  Well, off by a
> > > minute or so.  Clearly the new battery is good.
> > 
> > Turns out I misunderstood this.  I thought the system time was still
> > set from the RTC despite the warning.  It isn't.
> 
> Still, booting into the BIOS shows that the RTC keeps up, so it
> shouldn't be a battery problem.  I cleared the RTC memory, set the
> date and time in the BIOS again, but I still get the warning and
> FreeBSD ignores the RTC.  It looks like the RTCSD_PWR bit is stuck
> and there is no way to reset it.

Hi Christian,

When you say "the RTC keeps up" do you mean that the RTC keeps time when
mains power is removed - i.e. power cord unplugged for a "reasonable"
length of time? If the RTC doesn't "survive" complete removal of power
then you may want to double-check the CMOS jumper and battery.


Wayne





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