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Old 07-08-2022, 08:05 AM   #1
ichnilatis
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Effect of low battery on time-dependent functions.
I've noticed that, when the battery level is lower than 50%, every function that depends on the time (e.g. auto warmth, the clock in the status bar etc.) malfunctions. These functions work when I change pages (the clock in the task bar) or when I close a book (the auto warmth).
Does this happen on other devices?
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Old 07-08-2022, 10:37 AM   #2
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Definitely not on mine (OG H2O).
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Old 07-08-2022, 03:45 PM   #3
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Define "malfunctions"?
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Old 07-09-2022, 07:19 AM   #4
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I gave two examples above. The functions that depend on the time have no effect untill I turn the page or close the file.
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Old 07-09-2022, 08:00 AM   #5
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Quote:
Originally Posted by ichnilatis View Post
I gave two examples above. The functions that depend on the time have no effect untill I turn the page or close the file.
The functions that depend on time are constrained to a given timeframe on Pocketbooks if the autostanby plugin is enabled.

The autostandby plugin does the same as Pocketbook firmware does on its own: it sets the CPU to sleep after two seconds.

It becomes aggressive when the battery is below a certain threeshold: https://github.com/koreader/koreader...n/main.lua#L38

There's no obvious way to deal with it.

If you disable the autostandby plugin you'll get fairly worse battery time, since there's no standby at all unless requested by you by putting your device to sleep.

You'll get better results if you lower the "aggressive threesold" to
Code:
bat = 20,
or even to
Code:
bat = 5,
But again, the "aggresive threesold" just changes how time is added to the timeframe where the cpu is awake. And all functions that rely on "time ticking" will fail in the long run if the plugin is enabled.

But certainly, if you only see issues with battery below 60%, changing that parameter might help for your user case.
Last edited by pazos; 07-09-2022 at 08:03 AM.
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Old 07-09-2022, 08:37 AM   #6
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I don't have the autostandby plugin enabled in KOReader because I have made such settings in the Pocketbook firmware and I was afraid there might be a problem. I'll try your suggestion.

What does exactly "aggressive" mean in this case?
Last edited by ichnilatis; 07-09-2022 at 08:49 AM.
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Old 07-09-2022, 03:32 PM   #7
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Quote:
Originally Posted by ichnilatis View Post
What does exactly "aggressive" mean in this case?
Nothing if you have the plugin disabled. But then your issue makes no sense at all. Please double check that because they're a few "autosomething" plugins. The one that affects here is autostandby

With the plugin enabled:

the time you get added to the window frame where the app is alive is bigger when the battery is above 60% capacity and less when it is below 60%. My previous link contains all the info and the code in case you want to lurk.
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Old 07-10-2022, 08:23 AM   #8
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I changed the code to "bat = 5", but, as I have the plugin disabled, it may not have any effect...
By the way, Could I have enabled autostandby both in KOReader and in Pocketbook firmware? Is there a reason to do it? And, if I do, could there be a problem?
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Old 08-08-2022, 04:53 AM   #9
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There was no effect after the above change. But I noticed the following: I usually use my ebook device without internet access. When I did have access, I noticed that there was not the above problem; e.g. the time in the status bar changed or the automatic page turn worked even when the battery was below 50%. How does internet access affect?
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Old 08-08-2022, 09:37 AM   #10
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It prevents entering standby, probably.
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Old 08-08-2022, 09:44 AM   #11
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Quote:
Originally Posted by NiLuJe View Post
It prevents entering standby, probably.
But I have not activated the standby mode in KOReader; only in the Pocketbook settings.
Can it be enabled in both?
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