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Old 06-21-2016, 03:32 PM   #1
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Kindle Paperwhite Downgrade.
Is there any easy way to downgrade a kindle Paperwhite 2013 to 5.6.5 firmware?
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Old 06-21-2016, 06:22 PM   #2
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Is there any easy way to downgrade a kindle Paperwhite 2013 to 5.6.5 firmware?
Define what you mean by: "easy"
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Old 06-21-2016, 06:32 PM   #3
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And what firmware version is it running now? Do you have a TTL serial port adapter, and tools to remove the back cover?

How easy it is depends entirely on your starting conditions and experience level (including soldering skills and/or ingenuity). And as knc1 said, "easy" is a relative term.
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Old 06-21-2016, 07:09 PM   #4
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Yes I have a TTL serial port adapter and I am running firmware 5.8.1.
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Old 06-21-2016, 07:10 PM   #5
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Define what you mean by: "easy"
Any way that doesn't involve Taking the kindle apart.
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Old 06-21-2016, 07:21 PM   #6
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Any way that doesn't involve Taking the kindle apart.
There is no known way besides connecting to the serial port inside, at this time. Amazon calls what you want to do a "downgrade attack", and they have added code to the firmware to prevent that via non-invasive mechanisms. It would take discovering a vulnerability (i.e. software "mistake") to exploit, before we can downgrade firmware without a serial port connection. Not impossible, but not easy either.

When I jailbroke my PW1 immediately after I got it (being one of the first people to get one), NiLuJe called it "not a 0-day, more like a -150 day". That was clearly a mistake from lab126, because it exploited a simple "tarbomb" vulnerability they had already fixed in the K5 firmware multiple versions earlier.

Though lately, they have been getting really secure, which makes it look like they might have an aspie programmer (i.e. technology addict) on their staff at lab126.
Last edited by geekmaster; 06-21-2016 at 07:31 PM.
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Old 06-21-2016, 07:49 PM   #7
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Yes I have a TTL serial port adapter and I am running firmware 5.8.1.
Good.
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Any way that doesn't involve Taking the kindle apart.
So how where you expecting to use the serial port adapter if you knew in advance you wouldn't open the Kindle?

Is the device jailbroken?
If so, then you should be able to downgrade the 'main' system while running from the 'diags' system.

If not, then:
Choice one: Leave it alone and learn to love it.
Choice two: Change your mind about peeling the bezel off and using that serial port adapter.


Last edited by knc1; 06-21-2016 at 07:54 PM.
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Old 06-21-2016, 07:57 PM   #8
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Jailbreak is one of those starting conditions that matter here. And rescue pack (i.e. diags usbnet). And a little linux shell experience. Otherwise wait and see.
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Old 06-21-2016, 08:38 PM   #9
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How do you do it with serial method
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Old 06-21-2016, 08:43 PM   #10
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I think this is the thread you want.
https://www.mobileread.com/forums/sho...d.php?t=267541
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Old 06-21-2016, 09:02 PM   #11
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How do you do it with serial method
There are a number of ways, but the basics are:



For the serious answer, page up one post above this one.
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Old 06-21-2016, 09:19 PM   #12
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We never got a straight answer about whether this kindle has jailbreak, or any of those other questions. The only straight answer was to express no desire to open the kindle.
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Old 06-21-2016, 10:08 PM   #13
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Quote:
Originally Posted by knc1 View Post
There are a number of ways, but the basics are:



For the serious answer, page up one post above this one.
Last edited by Cinisajoy; 06-21-2016 at 10:14 PM.
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Old 06-21-2016, 10:35 PM   #14
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No it is not jailbroken
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Old 06-21-2016, 10:35 PM   #15
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Parochially prescient, eh?

Last edited by geekmaster; 06-21-2016 at 10:39 PM.
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