Turn off PW3

[JSWolf]

Is there a way to actually turn off a PW3? It's not jailborken.

[pazos]

Try to long press the power button for almost a minute. It should work (IIRC it worked on a PW1)

[Quoth]

No, there isn't on at least a PW3, DXG and older Basics and Kindle Keyboard. The apparent power off is merely a blank screen. The old Binatones, Sony PRS, some others and Kobo Touch, H2O, Libra etc do turn off.

The Kindles thus will need charged occasionally if unused. Maybe once a month. They may really turn off when the battery flat warning screen appears, but I'm not sure. Certainly then the clock is wrong.

The Kobo, Sony and Binatone obviously keep the clock running,but that's miniscule current. Even the original IBM AT clock might have run for 5 years on a set of AA Alkaline cells, though often an NiCd pack was used till they changed to coin Cells. The fat CMOS clock/settings module, often Odin Brand had the Lithium coin cell encapsulated and died after about 10 years. I've filed off the connections to that and glued a CR2032 holder to get old PCs going in the past. Some won't even go to setup screen if the battery is flat.

[JSWolf]

Originally Posted by Quoth

No, there isn't on at least a PW3, DXG and older Basics and Kindle Keyboard. The apparent power off is merely a blank screen. The old Binatones, Sony PRS, some others and Kobo Touch, H2O, Libra etc do turn off.

The Kindles thus will need charged occasionally if unused. Maybe once a month.

It's because of having to keep charging the Kindle that I want to turn it off. I think this is a huge blunder on Amazon's part to not allow Kindle to be turned off.

[Sirtel]

I charge my Oases once every 4-5 months when unused.

[Deskisamess]

If the screen is off, which is one of the choices that appear when you hold the power button for 5-10 seconds, what would still be "on"? They aren't like a computer or phone doing stuff in the background.

Put it in airplane mode, turn the screen off, and the device is off.

[JSWolf]

Originally Posted by Deskisamess

If the screen is off, which is one of the choices that appear when you hold the power button for 5-10 seconds, what would still be "on"? They aren't like a computer or phone doing stuff in the background.

Put it in airplane mode, turn the screen off, and the device is off.

It's still in sleep mode. That is not off.

[pazos]

I'm not talking about the "white screen of sleep", that happens when you press the power button a few seconds.

The hardware has means to reboot if software is left in broken state. To force a reboot you do:

1. press for 15 - 20 seconds
2. release the power button just a sec
3. press again a few seconds.

That will force a full reboot even on a kernel deadlock.

The same procedure, without releasing the power button, will eventually trigger a poweroff (or a reboot if something changed on the PMIC side)

I do remember that, because when I got my PW1 I soldered a TTL adapter on the serial header and checked that it behaves mostly like my kobo mini (ie: ARM cores are shutdown, power manager circuit it is still alive)

[hius07]

Long press of the power button reboots the device.
No way to power off without jailbreak.

[JSWolf]

Originally Posted by hius07

Long press of the power button reboots the device.
No way to power off without jailbreak.

I was hoping this wasn't true. But it seem it is true.

[Quoth]

Originally Posted by Sirtel

I charge my Oases once every 4-5 months when unused.

They need charged a little more often as the cell ages. Certainly that's possible on some newer Kindles. Also likely later Kindles use less power when idle / sleeping.

[j.p.s]

Originally Posted by Quoth

They need charged a little more often as the cell ages. Certainly that's possible on some newer Kindles. Also likely later Kindles use less power when idle / sleeping.

The Oases 2 and 3 and the PW4 have the ability to hibernate.

[j.p.s]

Originally Posted by JSWolf

Is there a way to actually turn off a PW3? It's not jailborken.

There are two ways to power down a non jailbroken kindle. Both have undesirable aspects.

1. Let the battery run down until the kindle powers itself off.

2. Use the ;shpm search bar command
https://wiki.mobileread.com/wiki/Kin..._Bar_Shortcuts
But beware that this will remove all user configuration and data (including books
and registration).

There are multiple quick and easy was to power off a jailbroken kindle.

[j.p.s]

Originally Posted by pazos

Try to long press the power button for almost a minute. It should work (IIRC it worked on a PW1)

No amount of fiddling with the power button will power off a kindle.

Originally Posted by Sirtel

I charge my Oases once every 4-5 months when unused.

Oases 2 and 3 and PW4 are able to hibernate, which is almost the same a power off. If all kindles could do that, almost all the need to power down a kindle would go away.

Originally Posted by Deskisamess

If the screen is off, which is one of the choices that appear when you hold the power button for 5-10 seconds, what would still be "on"? They aren't like a computer or phone doing stuff in the background.

That amazon dialog is poorly worded.

e-ink screens only use power when changing. A sleep screen image uses no more power than a blank screen.

Kindles are computers doing stuff in the back ground.

There are at least two different pieces of evidence that kindles do not power power down except under unusual conditions.

1. Kindles take a long time to boot. That doesn't happen after using a mumbo jumbo method to power a kindle off.

2. People have examined system logs after waking a kindle after a mumbo jumbo power of method and they are no different from those of a normal wake from sleep.

Put it in airplane mode, turn the screen off, and the device is off.

Why do you think the device is off after that?

[Quoth]

Originally Posted by j.p.s

There are two ways to power down a non jailbroken kindle. Both have undesirable aspects.

1. Let the battery run down until the kindle powers itself off.

2. Use the ;shpm search bar command
https://wiki.mobileread.com/wiki/Kin..._Bar_Shortcuts
But beware that this will remove all user configuration and data (including books
and registration).

There are multiple quick and easy was to power off a jailbroken kindle.

And on older Kindles you can't register till the date is correct and you can't enter the date on some. Some don't even have a menu to change the time! You have to repeatedly connect to 3G or Wifi, depending on model till it set it off the internet.

No doubt the hibernation mode of later models is a CPU feature.

Also best to leave connected to laptop for charging after logical eject when you added books as it's then doing indexing.