linux-kernel - Re: [bugreport] "hwclock -w" reset time instead of setting the right time

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Message-ID: <20200103100232.GH3040@piout.net>
Date:   Fri, 3 Jan 2020 11:02:32 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
Cc:     J William Piggott <elseifthen@....com>,
        Karel Zak <kzak@...hat.com>, util-linux@...r.kernel.org,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        linux-rtc@...r.kernel.org
Subject: Re: [bugreport] "hwclock -w" reset time instead of setting the right
 time

Hi,

On 02/01/2020 22:17:26+0500, Mikhail Gavrilov wrote:
> On Thu, 2 Jan 2020 at 21:59, J William Piggott <elseifthen@....com> wrote:
> >
> > You've demonstrated that 'hwclock -w' does not 'reset' the RTC.
> >
> > Does your new motherboard use a battery backup for the RTC?
> > Is the battery good?
> >
> 
> If you look carefully demonstration the RTC 'reset' happens after
> reboot __only__ when 'hwclock -w' have been entered before reboot.
> So if I reboot the computer without 'hwclock -w' the RTC will be not reset.
> 

What is your kernel version?

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com