Downgrading from 5.7.2.1 (jailbroken Kindle via diags)

[geekmaster]

Originally Posted by Cinisajoy

You two could come downstairs and play. I need to up my post count.

Seriously, great advice.

You have a play room? For adults?

[Cinisajoy]

Originally Posted by geekmaster

You have a play room? For adults?

I was thinking here:
https://www.mobileread.com/forums/sho...3018&page=5400
but I like the way you think.

[shalym]

Originally Posted by Cinisajoy

You two could come downstairs and play. I need to up my post count.

Seriously, great advice.

I'm curious--why do you need to up your post count? Does something magical happen when you have a certain number of posts?

Shari

[geekmaster]

Originally Posted by shalym

I'm curious--why do you need to up your post count? Does something magical happen when you have a certain number of posts?

Shari

Somebody claimed in another forum that your karma is related to your post count, and Alexander Turcic (owner, founder and computer geek) thanked the poster for the simple explanation. This is confusing because my experience here shows that karma is related only to how much karma other members gave me, not post count.

[Cinisajoy]

Originally Posted by shalym

I'm curious--why do you need to up your post count? Does something magical happen when you have a certain number of posts?

Shari

No I am trying to win a silly game and up my post count there. Come on down and play.
Well I did get a cool number the other day. 6,666.

[knc1]

You only have to make one post - the last one.

[eschwartz]

Originally Posted by geekmaster

Somebody claimed in another forum that your karma is related to your post count, and Alexander Turcic (owner, founder and computer geek) thanked the poster for the simple explanation. This is confusing because my experience here shows that karma is related only to how much karma other members gave me, not post count.

It is your karma-giving power that relates to your post count. We even have a Wiki page about it, see: Karma.

[geekmaster]

Originally Posted by eschwartz

It is your karma-giving power that relates to your post count. We even have a Wiki page about it, see: Karma.

Thanks for the link. It coincides with my experience that you only receive karma when it is bestowed upon you by another member (limitation #1: "The only way for a person's karma to rise is for someone else to give them karma.").

"Giveable" karma = (days registered)/30 + (post count)/40 + (karma)/200.

So "days registered" is the dominant factor, and the act of giving karma triggers a karma change for the recipient. And you get one additional karma point you can give for each 200 new posts. I see now why the "last post wins" threads are so popular.

The original post I questioned did not make a clear distinction in my mind between karma and "karma-giving power", and I need such distinctions to avoid confusion and misunderstanding. That is also why I add so much extra syntactic sugar to my written words, to attempt to prevent such alternate interpretations.

[geekmaster]

To "hack all the kindles", the first step (universal downgrade) is here:
https://www.mobileread.com/forums/sho...d.php?t=275877

And the second step (universal jailbreak) is here:
https://www.mobileread.com/forums/sho...d.php?t=275887

[n1kk00]

A little something to consider regarding @Arnie97's experiment with not clearing the DBs under /var/local. I went this route when I was downgrading my wife's PW2 (on v5.7.4) the other day. It was ok initially. However, later when I tried to sideload a book it didn't show up on the home screen; it opened just fine in KOReader and on my PW2 so not a file issue. Figuring the only difference was that I didn't clear the DBs I thought I'd clear them now - did it and after a couple of reboots all was back to normal, sideloaded books would appear and all. So probably not a good idea to skip this step

[geekmaster]

Originally Posted by n1kk00

A little something to consider regarding @Arnie97's experiment with not clearing the DBs under /var/local. I went this route when I was downgrading my wife's PW2 (on v5.7.4) the other day. It was ok initially. However, later when I tried to sideload a book it didn't show up on the home screen; it opened just fine in KOReader and on my PW2 so not a file issue. Figuring the only difference was that I didn't clear the DBs I thought I'd clear them now - did it and after a couple of reboots all was back to normal, sideloaded books would appear and all. So probably not a good idea to skip this step

Thanks for your report. DB format differences are why we clear this DB, to prevent DB corruption problems (which may potentially brick a kindle).

[Arnie97]

Originally Posted by n1kk00

A little something to consider regarding @Arnie97's experiment with not clearing the DBs under /var/local. I went this route when I was downgrading my wife's PW2 (on v5.7.4) the other day. It was ok initially. However, later when I tried to sideload a book it didn't show up on the home screen; it opened just fine in KOReader and on my PW2 so not a file issue. Figuring the only difference was that I didn't clear the DBs I thought I'd clear them now - did it and after a couple of reboots all was back to normal, sideloaded books would appear and all. So probably not a good idea to skip this step

Sideloaded books and other things happened to work well on my device, but your mileage may vary. Anyway, it's always a safer choice to reset the databases.

[baalajimaestro]

Sirs, A Problem appeared while Diags downgrading my Kindle PW2(9017). It doesnt boot now. Undergoes a boot loop. OS used PW2 5.6.5 to flash.(the one I provided a link). When I extracted it with kindletool it showed kindle PW2 Intl as compatible. Dont know what happened.While this command was given:

zcat /mnt/us/rootfs.img.gz | dd of=/dev/mmcblk0p1 bs=4096

Kindle gave back this to my terminal on linux

dd: writing '/dev/mmcblk0pl': No space left on device
31928+0 records in
31927+0 records out
130772992 bytes (124.7MB) copied, 16.763004 seconds, 7.4MB/s

Seems like this should have more warnings!

How can de-brick my kindle?
Still diags works and i am able to ssh to my kindle!

Can I retry it with bin files from 5.8.7?

Please help me out!

B.Baalaji

[Antinoos]

Is it definitely a PW2?? Such an old model?! Bought second hand? The intial special factory downgrade version for that model is 5.4.3.2 (see post #1 step 3). This MUST be used. Not any other version... or you'll brick your device.

[knc1]

Originally Posted by baalajimaestro

- - - - -
How can de-brick my kindle?
Still diags works and i am able to ssh to my kindle!
- - - - -

You must use firmware for a PW2-4GB Kindle on a 9017, firmware for a PW2-2GB Kindle will not work.
(Which you just discovered.)