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Old 06-22-2015, 01:06 PM   #2217
xor_
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Posts: 104
Karma: 470830
Join Date: Nov 2012
Location: Berlin
Device: Kobo Libra 2, Kobo Forma, Tolino Epos 2
I'm trying to understand what happens on my Glo HD device when I suspend it with the magnet cover mechanism while koreader is running. (No nickel in the background, started from KSM)

The background is, I easily get 30 percentage point charge drops per day, with my Glo HD sitting still being "suspended" by the cover. And that just seems too much. I used to think the device just wakes up occasionally when I move it around during the day in my bag. But I get those drops even when I make sure it just sits still all day. It does show the book cover screensaver and the "Suspended" message.

I've always felt that on the old Glo the battery cycles were shorter than under nickel, but it's never been as drastic as what I see on the Glo HD (which I think is supposed to have a stronger battery).

I assumed the suspend.sh script would be involved, and thought maybe it would help if I tried an

echo disk > /sys/power/state

instead of the suspend to RAM command involved. But I was surprised to see that when I put a debug statement like

date >> /mnt/onboard/mydate.txt

into suspend.sh, that file never gets written when the sleep cover is activated. It looks like that script isn't being executed.

So I thought instead of digging into the code trying to understand what's happening, I'd ask in case someone knows off the bat.

Last edited by xor_; 06-22-2015 at 01:13 PM.
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