[mdlug] Upgrading from Ubuntu 12.04 to 14.04 makes hardware clock stay on UTC

R Kannan rk111810 at gmail.com
Fri Jun 9 21:29:58 EDT 2017


Turning off NTP seems to have fixed the issue. Thanks again.

On 06/09/2017 07:37 PM, R Kannan wrote:
> Thanks to all who answered.
>
> Bob, My Ubuntu version of /etc/default/rcS does not have the comment 
> you have below.
>
> I will try disabling NTP and see if that helps. Was NTP not on by 
> default in Ubuntu 12.04 which I was using before?
>
>
> On 06/09/2017 09:27 AM, Bob wrote:
>> You need to go back to the ACPI wiki page and look at  Ubuntu 9.10 and
>> later, under Sec 3
>>
>> On my, up to date, Debian Sid system this is what's in the
>> /etc/default/rcS file.
>>
>> ##################################################################
>> # NOTE: This file is ignored when systemd is used as init system #
>>
>> and as pointed out by Dr. meier, check if NTP is running.
>>
>> Bob Dion
>>
>> On 06/08/2017 07:55 PM, R Kannan wrote:
>>> Hi
>>>
>>> I had Mythbuntu 12.04 with hardware clock set to local time and using
>>> ACPI (https://www.mythtv.org/wiki/ACPI_Wakeup) to wake up the system
>>> from hibernation to record programs and do other scheduled tasks. It
>>> was all working OK. Note that the hardware clock update is disabled
>>> (Section 3) in order for this to work.
>>>
>>> When I upgraded to 14.04 I found that hardware clock reverted to UTC.
>>> I changed the following line in /etc/default/rcS
>>>
>>> UTC=yes
>>>
>>> to
>>>
>>> UTC=no
>>>
>>> I found that the hardware clock reverts back to UTC whenever the
>>> system wakes up from hibernation on its own. It does not happen if I
>>> manually bring it up. According the following link, the above is the
>>> only change I need to do for Ubuntu 14.04
>>>
>>> https://help.ubuntu.com/community/UbuntuTime#Make_Linux_use_.27Local.27_time 
>>>
>>>
>>>
>>> Any ideas on what is resetting the hardware clock?
>>>
>>> Thanks for any help
>>>
>>>
>>>
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>



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