I don't know that this will address this issue, but there is a
setting controlling "battery optimization". It looks like apps are
defaulted to optimize, setting it to "don't optimize" may keep K-9
from going to sleep when other apps do.
You can get to this by:
- [android system] settings
- battery
- vertical dots (upper right)
-- select battery optimization
- "not optimized" pulldown
-- select "all apps"
- scroll down/select K-9
- set to "don't optimize"
> Date: Sunday, January 24, 2016 04:14:48 -0800
> From: John Thorp <[email protected]>
>
> I have noticed that this problem does not occur if my Nexus tablet
> is plugged into the mains power supply. When plugged-in the
> checking for my POP mail continues indefinitely, but if running
> on the battery the syncing stops at some point (1-4 hours) even
> if the battery is still showing full. Has anybody else noticed it
> is OK if on mains power?
> I suspect this "problem" may relate to a change in the latest
> release, which I seem to recalled introduced changes to stop
> excessive battery usage. Battery usage may be a problems on smart
> phones but not on my tablet so maybe this could become a
> selectable on/off function at the next release?
>
> On Monday, January 4, 2016 at 5:41:31 PM UTC, John Thorp wrote:
>
>> I think this is since the last K-9 update (5.007 28 Nov 2015) my
>> mail will sync automatically OK for a while and then I get
>> "Syncing disabled" If I stop K-9 and restart then syncing
>> restarts (POP with Orange FSNET) I get a message in K-9
>> Mail-error folder -- Folder does not exist........... - copied
>> in full below.
>> I have tested Google mail and that does not have the problem so
>> it seems confinded to K-9
>> Any advice would be appreciated as I do want to stick with K-9
>>
>> -----------------------------
>> K9-Mail version: 5.007
>> Device make: asus
>> Device model: Nexus 7
>> Android version: 6.0.1
>>
>> com.fsck.k9.mail.MessagingException: Folder does not exist
>> at
>> com.fsck.k9.mail.store.Pop3Store$Pop3Folder.open(Pop3Store.java:3
>> 12) at
>> com.fsck.k9.controller.MessagingController.synchronizeMailboxSync
>> hronous(MessagingController.java:1041) at
>> com.fsck.k9.controller.MessagingController.access$400(MessagingCo
>> ntroller.java:111) at
>> com.fsck.k9.controller.MessagingController$35.run(MessagingContro
>> ller.java:4506) at
>> com.fsck.k9.controller.MessagingController.run(MessagingControlle
>> r.java:435) at java.lang.Thread.run(Thread.java:818)
>>
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