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Old 03-12-2014, 11:01 AM   #16
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Right you are, if you let me know when it's ready to test, thank you ramast.
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Old 03-12-2014, 11:15 AM   #17
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It works on my PW2.
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Old 03-12-2014, 11:25 AM   #18
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Thank you for that information as well dsmid. I eagerly await the updated package with your modifications included.
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Old 03-13-2014, 12:53 PM   #19
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Changed the script to be upstart service based on Dsmid's code.
Replaced the "sleep 60" pause with a better error handling
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Old 03-13-2014, 05:36 PM   #20
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Cover Amazon
Ramast:

I have PW1 with original cover from Amazon.

When you open the cover its turn on

Could i use your script and How it will work?


Than you in advance
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Old 03-14-2014, 12:47 AM   #21
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I am using kindle paperwhite1 for testing though I don't have the magic cover.
I am sure it will work.
in your case the script wait few seconds after you close your cover and put your kindle into sleep mode to save battery (just like putting your laptop in sleep mode which make its battery last longer)
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Old 03-14-2014, 02:37 AM   #22
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Closing the magic cover is the same as pushing the power button, there's no difference.
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Old 03-14-2014, 02:43 AM   #23
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@ramast:
Consider adding this stanza to make sure the service won't respawn when exited:
Code:
normal exit 0 TERM
Or test what happens when lipc-wait-event fails.
Last edited by dsmid; 03-14-2014 at 02:51 AM.
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Old 03-14-2014, 09:46 AM   #24
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script would respawn because we included the keyword respawn
I deleted this line and now it exit as expected when it fails.

I've upload the new version
Last edited by ramast; 03-14-2014 at 11:16 AM.
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Old 03-17-2014, 09:56 AM   #25
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Does this achive the same result of turning off the screen after the seven second power button press? Regarding battery consumption
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Old 03-18-2014, 02:23 AM   #26
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Quote:
Originally Posted by ramast View Post
I own kindle white for a while and noticed that when I turn it off (by pushing the power button) kindle doesn't really turn off it just turn the light of the screen off, show nice screen save and continue running.

I knew for sure its running when I installed usbnetwork and was able to access my kindle through wireless connection while it is supposedly turned off [ shocking ! ]
Are you sure this issue is not related to the ssh-over-wifi setup or something? Because it is completely non-reproducible for me on my Paperwhite 2, also my Kindle 3 Keyboard did not have this issue either. Both(*) have/had USBNET installed and both go/went to sleep.

On the PW2, what happens if I turn the device off (pressing the power button) is the following sequence of events:
  • screensaver starts
  • about 1-2 minutes later, powerd is firing readyToSuspend events (counting down 10, 7, 6, 2, 1)
  • ~10s after the first readyToSuspend event the device goes to mem sleep

If I see it correctly, your script triggers the mem sleep at the first readyToSuspend event (not sure this will be a good idea), so at best it saves 10s of non-mem sleep time (during which the device is idling). If you turn your device on/off 10 times a day, this saves 100 seconds of CPU and WiFi idling. I would guess this is not going to have a measurable effect.

This is tested on Kindle Paperwhite 2, firmware 5.4.3 jailbreaked, USBNET installed (but no connection via WiFi configured), USB cable plugged out (otherwise it is charging and won't sleep), WiFi on.
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Old 03-18-2014, 02:47 AM   #27
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@peterson: I can confirm that my K3 and PW2 suspends to mem without any battery saver as well.
The log shows that nothing is running during the sleep, so it's a real suspend, not just a low-power mode. I suspected that Kindle wakes up time to time to check the todo events but this doesn't seem to be true.
That would mean the battery saver has zero effect on battery.
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Old 03-18-2014, 03:01 AM   #28
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Quote:
Originally Posted by dsmid View Post
I suspected that Kindle wakes up time to time to check the todo events but this doesn't seem to be true.
Well, there are ways to wake-up from a mem sleep :-)

I also can not reproduce ramast's claim that when doing the "echo mem" line (which is equivalent to the device suspending on its own) the device is not waking up anymore when plugging in the USB cable. For me it does wake up (it stays in screensaver, though, but the device is now on until I unplug the cable again).
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Old 03-18-2014, 08:42 AM   #29
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i don't have PW2 I have PW1.
and before running this script there was always a big difference between turning kindle off with airplane mode on or off.
In one occasion - which made me write this software - my kindle's battery was critically low just because I forgot to turn off wireless before closing it two weeks earlier.

Since kindle PW1 also has readyToSuspend, I suppose it goes to standby mode instead of full sleep.
Apparently this is not the case for kindle PW2

Anyone with PW1 here to test and confirm?
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Old 03-18-2014, 08:46 AM   #30
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And peterson you are right, my claim was not correct.
I took it back in the second comment in this post
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