Shutting down / Rebooting Kindle Linux

Ruskie_it · 12-04-2014, 02:06 PM

Guys I was just wondering...
Ok, I have got the usbnet hack and I am now on the command line.
Cool. But what happens now if I issue a "reboot" command? Or a "shutdown -h now" command?
Will the kindle restart correctly?
From the user layer I know the PW2 can be rebooted. I then assume that the system is able to come up from zero power to functional state, therefore I expect a "reboot" to work.
But I don't know what happens if I tell it to shutdown. Will the power button act as a "start" button even when the system is powered off?

eschwartz · 12-04-2014, 10:45 PM

I usually use "poweroff" or "reboot", but yeah.

Fun fact -- this is pretty much the only way to actually shutdown the Kindle entirely.

Ruskie_it · 12-05-2014, 02:21 AM

Quote:

Originally Posted by eschwartz

I usually use "poweroff" or "reboot", but yeah.

Fun fact -- this is pretty much the only way to actually shutdown the Kindle entirely.

Yes, that's the reason I was wondering about it in the first hand.
The second reason was I am curious.

So if you issue the "poweroff" command - maybe via Kterm - the kindle shuts down gracefully and stays off until you press the power button?

dsmid · 12-05-2014, 03:28 AM

Yes, exactly.
The power consumption is (close to) zero then.
It's a good habit to power off Kindle you don't use to protect the battery (Li-Ion and Li-Pol batteries suffer from staying in discharged state for a long time).

knc1 · 12-05-2014, 03:32 AM

Quote:

Originally Posted by Ruskie_it

Yes, that's the reason I was wondering about it in the first hand.
The second reason was I am curious.

So if you issue the "poweroff" command - maybe via Kterm - the kindle shuts down gracefully and stays off until you press the power button?

Yes, whatever it does, it will do gracefully.
It has a prioritized, dependency aware, system initialization that also gets triggered for shutting down the system.

"shutdown -h ..." is the most general of the *nix commands -
The others mentioned are lower level hooks into it.

You can even go into the /sys tree, in the sub-tree about power management and force the specific end condition.

But yeah, it will not self-destruct.
To do that, you have to un-plug the battery while the indexer is still running.

Ruskie_it · 12-05-2014, 06:39 AM

Went for it. It works!
Too bad before powering off it changes the screen to the "Hang on, Kindle is starting" which is actually not true.
But it stays off, it doesn't react to the magnet too, that's what matters the most.

knc1 · 12-05-2014, 08:48 AM

It has been that way forever.
There isn't any "Shutdown Completed" screen, so what you are seeing is the: "expected behavior".
I.E: You got it right - it is as dead now as it gets without disconnecting the battery.

Ruskie_it · 12-05-2014, 09:12 AM

Quote:

Originally Posted by knc1

It has been that way forever.
There isn't any "Shutdown Completed" screen, so what you are seeing is the: "expected behavior".
I.E: You got it right - it is as dead now as it gets without disconnecting the battery.

Yes I wasn't even asking. I was sure it was meant to be like that, because in Amazon's intentions each time the PW2 powers off it is because it is rebooting, so they managed to put that "restart" screen in the power-off scripts or even in the kernel (I assume the kernel has been compiled ad hoc).
By the way, which init method does the Kindle Linux use? Sys 5, BSD, or what?

knc1 · 12-05-2014, 09:30 AM

The series 5.x firmware is using upstart.
Models prior to that used SYS-V.

I think you have it, that screen is the default screen when upstart doesn't have anything else to do (either before start-up or after shut-down).

Since the Kindle (normally) **never** shuts down - they probably don't see any reason to change it.

For other readers:
The Kindle's main processor does a "suspend to RAM" and then the RAM is powered down into a "keep alive" mode.
Another note: The above is not strictly related to when it shows a screen saver, it can and sometimes will, suspend between page turns.

Glorfindel · 12-05-2014, 09:57 AM

knc1: I did the poweroff command a while ago and I had to plug it in to an external power source to power it back on, the power button wasn't working.

knc1 · 12-05-2014, 07:54 PM

Quote:

Originally Posted by Glorfindel

knc1: I did the poweroff command a while ago and I had to plug it in to an external power source to power it back on, the power button wasn't working.

I have noticed the same on some models, prior to the firmware series 5.x devices.

12-04-2014, 02:06 PM	#1
Ruskie_it Fanatic Posts: 538 Karma: 1000000 Join Date: Dec 2011 Location: Rome, Italy Device: Kindle PW5, Kindle PW4, Kindle 4 NT	Shutting down / Rebooting Kindle Linux Guys I was just wondering... Ok, I have got the usbnet hack and I am now on the command line. Cool. But what happens now if I issue a "reboot" command? Or a "shutdown -h now" command? Will the kindle restart correctly? From the user layer I know the PW2 can be rebooted. I then assume that the system is able to come up from zero power to functional state, therefore I expect a "reboot" to work. But I don't know what happens if I tell it to shutdown. Will the power button act as a "start" button even when the system is powered off?

12-05-2014, 08:48 AM	#7
knc1 Going Viral Posts: 17,212 Karma: 18210809 Join Date: Feb 2012 Location: Central Texas Device: No K1, PW2, KV, KOA	It has been that way forever. There isn't any "Shutdown Completed" screen, so what you are seeing is the: "expected behavior". I.E: You got it right - it is as dead now as it gets without disconnecting the battery. Last edited by knc1; 12-05-2014 at 08:52 AM.

12-05-2014, 09:30 AM	#9
knc1 Going Viral Posts: 17,212 Karma: 18210809 Join Date: Feb 2012 Location: Central Texas Device: No K1, PW2, KV, KOA	The series 5.x firmware is using upstart. Models prior to that used SYS-V. I think you have it, that screen is the default screen when upstart doesn't have anything else to do (either before start-up or after shut-down). Since the Kindle (normally) never shuts down - they probably don't see any reason to change it. For other readers: The Kindle's main processor does a "suspend to RAM" and then the RAM is powered down into a "keep alive" mode. Another note: The above is not strictly related to when it shows a screen saver, it can and sometimes will, suspend between page turns. Last edited by knc1; 12-05-2014 at 09:34 AM.

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12-04-2014, 10:45 PM	#2
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85397180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	I usually use "poweroff" or "reboot", but yeah. Fun fact -- this is pretty much the only way to actually shutdown the Kindle entirely.

12-05-2014, 03:28 AM	#4
dsmid Linux devotee Posts: 598 Karma: 2069047 Join Date: Feb 2011 Device: Kindle 3, Kindle 4B, Kindle PW2	Yes, exactly. The power consumption is (close to) zero then. It's a good habit to power off Kindle you don't use to protect the battery (Li-Ion and Li-Pol batteries suffer from staying in discharged state for a long time).

12-05-2014, 06:39 AM	#6
Ruskie_it Fanatic Posts: 538 Karma: 1000000 Join Date: Dec 2011 Location: Rome, Italy Device: Kindle PW5, Kindle PW4, Kindle 4 NT	Went for it. It works! Too bad before powering off it changes the screen to the "Hang on, Kindle is starting" which is actually not true. But it stays off, it doesn't react to the magnet too, that's what matters the most.

12-05-2014, 09:57 AM	#10
Glorfindel Force-Aware Elf Posts: 4,757 Karma: 11557898 Join Date: Feb 2014 Location: Valinor Device: Kindle 4 w/SO	knc1: I did the poweroff command a while ago and I had to plug it in to an external power source to power it back on, the power button wasn't working.

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