[mythtv-users] timezone on FE and BE not the same (but they are!)

Lee McLaren lists at lrm.com.au
Thu Oct 6 08:32:59 UTC 2011

I had the same problem recently, if the TZ checks ok, make sure the 
times on both machines are exactly the same, I did mine manually as I am 
doing diskless, better off with NTP I expect.

On 6/10/2011 1:37 PM, Michael T. Dean wrote:
> On 10/05/2011 02:45 AM, Brian J. Murrell wrote:
>> My newly crafted frontend machine, built on v0.25pre-3437-gaa38944 is
>> whining:
>> 2011-10-05 02:39:55.516952 C  Time zone settings on the master backend
>> differ from those on this system.
>> 2011-10-05 02:39:55.516975 N  Detected time zone settings:
>>       Master: Zone ID: 'America/Toronto', UTC Offset: '-14400', Current
>> Time: '2011-10-05T02:39:55'
>>        Local: Zone ID: 'Etc/UTC', UTC Offset: '-14400', Current Time:
>> '2011-10-05T02:39:55'
>> Yet the /etc/localtime file on both machines is identical:
>> frontend# md5sum /etc/localtime
>> 78936ec75f504c9df36e5454e9770c9b  /etc/localtime
>> backend# md5sum /etc/localtime
>> 78936ec75f504c9df36e5454e9770c9b  /etc/localtime
>> Both of which match a different FE around here that's working just fine:
>> other_frontend# md5sum /etc/localtime
>> 78936ec75f504c9df36e5454e9770c9b  /etc/localtime
>> All of which are the same as:
>> frontend# md5sum /usr/share/zoneinfo/America/Toronto
>> 78936ec75f504c9df36e5454e9770c9b  /usr/share/zoneinfo/America/Toronto
>> So what the h-e-double-hockey-sticks is going on here with this new FE?
> Either your frontend is not using /etc/localtime to set its time zone...
> Time zone can be overridden with TZ environment variable (i.e.
> TZ='Etc/UTC').
> Different distros use different approaches for specifying/configuring
> time zone, so if, perhaps, you recently switched distros, you may not
> have configured it properly/fully for your new distro.
> Or, for some reason, someone overwrote /usr/share/zoneinfo/Etc/UTC with
> a copy of /usr/share/zoneinfo/America/Toronto...
> $ md5sum /usr/share/zoneinfo/Etc/UTC
> c79354b8dbee09e62bbc3fb544853283  /usr/share/zoneinfo/Etc/UTC
> I'm guessing yours gives 78936ec75f504c9df36e5454e9770c9b...  This
> generally occurs become some brain-dead distro decides to use a symlink
> for /etc/localtime that points to the local zone file (i.e. ln -s
> /usr/share/zoneinfo/Etc/UTC /etc/localtime ) instead of placing a copy
> of Etc/UTC at /etc/localtime (it makes for a lean, mean distro--it saves
> a whole 118 *bytes*!!!).  Then when a user tries to set the proper time
> using the command line (rather than GUI config tools), they do a sudo cp
> /usr/share/zoneinfo/America/Toronto /etc/localtime , and, since
> /etc/localtime is pointing to /usr/share/zoneinfo/Etc/UTC , the user
> ends up copying America/Toronto on top of Etc/UTC.  Then they may notice
> the new time zone didn't take, and eventually end up actually deleting
> the /etc/localtime symlink and then copying America/Toronto to
> /etc/localtime, and the new time zone "takes" and they think all is
> well--not knowing they "corrupted" their zone files...
> Mike
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