Re: [tlug] Ubuntu 13.10 clock problems (was: Ibus and Ubuntu based)

[Bruno Raoult <braoult@example.com>]

On Wed, Nov 6, 2013 at 8:58 PM, Lyle H Saxon <llletters@example.com> wrote:

On Tue, Nov 5, 2013 at 5:28 PM, Bruno Raoult <braoult@example.com> wrote:
> On Tue, Nov 5, 2013 at 8:58 AM, LHS wrote:
>> I've had clock problems when running from the optical drive - no idea
>> why....
>
> What do you mean? Booting from CD/DVD?

Yes.

 Likely a timezone issue in this case.
> If it is the case, we come back again to the same issues:
> 1) your system considers the HW clock is UTC, but it is localtime. I am not
> sure you can change this on a liveCD system (again, switching Windows
> to UTC would likely avoid all these kind of issues).

But in booting from a live DVD (some recent versions of distros that
are *supposed* to fit on a CD are slightly too large and need to be
put on a DVD), that would have no connection with whatever else is on
the hard drive, would it?

Sure, but it would have access to the HW clock. This is our point for a few

weeks now.

 

Well, in more detail, the specific problem I had was that although the
clock was showing the correct local time, when I copied some photos
over to the computer (from an SD card reader), it changed the
*metadata* of the photos in the process (Very Evil behavior in my
opinion) and so the matadata on all the photos was shifted by... ten
or eleven hours.

If you just "copied" the files, this is just impossible. How did you copy the files?

With a photo program, or just a simple copy?

I have a couple of questions on what could have happened:

Did you check meta-data on the SD card with the Linux system? Or did you compare

the time with 2 different systems (for instance the camera itself, and the Linux system)?

Which format are the pictures? jpeg?

Does your camera have a GPS, and/or the notion of timezone?

I made a wild work-around to fix the issue (too convoluted and analog
to mention here) that fixed the issue of losing the accurate date and
time information that goes with the pictures, but not the computer
problem of mutating mata-data simply when copying photos over to a
hard drive....

exiftool would change the time(s) of all your pictures with a single command, but I doubt you have to do it, as the pictures meta-data was not changed (if you copied them "normally").

Could you send us the metadata of one file on the SD card and on your Linux box

after the copy? I mean as shown by the Linux box.

You can get it with the command "exiftool" (or others, there are many).

Thanks,

br.

--
2 + 2 = 5, for very large values of 2.