I'll repost my earlier message explaining exactly what settings made
things work for me on a Galaxy S7. I haven't seen anyone say that
they tried these exact settings and still had a problem. I've been
using these settings for months now and they continue to work for me.
Dan
> I had this problem ("Syncing disabled") after getting a new Galaxy S7,
> and then upgrading from Android 6 to Android 7. I did the following,
> and things have been fine for about a week now:
>
> - In k9 > Global Settings > Network > Background sync: changed it
> from "Always" to "When 'Auto-sync' is checked. This seems like a
> step backwards, but it caused syncing to start once when I tried it.
> It might be that it just causes k9 to reset itself in some way,
> so it might be irrelevant.
>
> - In Device Maintenance > Battery, in the App power monitor section,
> make sure k9 is not checked. (It was not.) Also, added k9 to
> "Unmonitored apps", lower on that screen.
>
> - In Device Maintenance > Battery > Battery Usage, selected Optimize
> battery usage from three dot menu, selected "All apps", and then
> turned off optimization for k9.
>
> Note that the last two are separate settings. I don't understand
> why there are two different types of "doze", but I think many people
> who can't solve this problem only adjust one of these settings, not
> both.
>
> Dan
>
> PS: I'm getting excellent battery life, even with the above settings.
> Android says that k9 is using only 0.08% of my battery per hour.
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