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Old 04-06-2023, 12:01 PM   #1
mattcd216
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K4 time zone

Hi. I've used a K4 to make the literary clock project. Worked nicely for ages, until the UK moved from Greenwich Mean Time to British Summer Time. The kindle hasn't changed time zone, it would appear. It's an hour behind. Not the literary clock project, but the device itself. It doesn't seem to update as per network time once on wifi, either.

Any ideas?!

Thanks,
Matt
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Old 04-06-2023, 12:04 PM   #2
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If you care about the native UI, there's a slightly obtuse `settz` script you can use.

If you don't, it's a Linux system, just import a sane timezone file from any halway recent Linux system in there (IIIRC, it's in the standard place; if not, dig around in /var/local) and fix the date.
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Old 04-12-2023, 09:35 AM   #3
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Thanks for the steer.

The date command shows the kindle is in UTC zone, but I'm not getting much further. timedatectl does not work. I don't have a timezone file in the /etc directory. The file /etc/localtime links to /var/local/system/tz but I can't find that file when I cd to that directory.

There is a last_time file in /etc/local/system but I don't seem to be able to do much with it.
Code:
[root@kindle system]# ls -l last_time
---x--xr-T    1 root     root            8 Feb 16 11:28 last_time
Any pointers?

Thanks again.
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Old 04-12-2023, 01:04 PM   #4
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Quote:
Originally Posted by mattcd216 View Post
timedatectl

Nor should it, that's a systemd special, IIRC .

Quote:
Originally Posted by mattcd216 View Post
The file /etc/localtime links to /var/local/system/tz but I can't find that file
Well, you kinda answered your own question there . Just import the right tzdata file from a Linux system in place of that missing varlocal one.
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Old 04-17-2023, 02:04 PM   #5
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Thanks for the tip. I created the tz file and put Europe/London in it. A cat of the /etc/localtime link produces that. Still can't get the kindle to jump forward to British Summer Time, though.
Also tried recreating the symlink to /var/local/system/Europe/London but that didn't work.

Only command I can get to work is the date command, which shows UTC. timedatectl does not work. Also no /usr/share/zoneinfo directory, which a lot of guides point to.

I'm away for a few weeks now. Will get back on it when I'm back.

Thanks for the help.
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Old 06-07-2023, 03:07 PM   #6
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Finally solved this.

The /etc/localtime sym linked to a file that didn't exist. I scp'd the Europe/London file from my ubuntu laptop over to the kindle and recreated the sym link.
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Old 05-10-2024, 11:40 AM   #7
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Quote:
Originally Posted by mattcd216 View Post
Finally solved this.

The /etc/localtime sym linked to a file that didn't exist. I scp'd the Europe/London file from my ubuntu laptop over to the kindle and recreated the sym link.
Thanks for sharing your solution.

Moving a file like
Code:
/usr/share/zoneinfo/Europe/London
from a recent Linux system to
Code:
/var/local/system/tz
on the Kindle seemed to initially work, but didn't survive a reboot.

Symlinking the
Code:
/etc/localtime
file directly to the time zone file seems to fix this:
Code:
ln -s /London /etc/localtime
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Old 10-22-2024, 07:07 PM   #8
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@qadzek

Thank you very much for /etc/localtime !
Worked charms on Kindle Scribe. “date” command picks it up happily

I copied sane /usr/share/zoneinfo from Ubuntu MATE distro.
I also made copies localtime_XX, localtime_YY in /etc/, so I can quickly switch by renaming them.

What didn’t work for me (and I would discourage anyone to do so because messing with upstart can be deadly),
adding this to /etc/upstart/env
export TZ=‘America/New_York’

Funnily enough, if I did this via ssh terminal, then it would apply and “date” command picks it up. But now when it is in the upstart (I checked all other exports that env does, they went in).
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