Kindle Touch serial port recovery.

[szfisher]

Originally Posted by geekmaster

A complication was that I had to reset a boot counter manually. The file /var/local/upstart/lab126_gui.restarts had the value "2" in it. I did "echo 0 > /var/local/upstart/lab126_gui.restarts" to reset the boot counter. [Thanks for the suggestion, nueva!]

Hi, geekmaster

Can you tell me how to reset the boot counter manually via serial? How do you enter Login Prompt from fastboot? It is very helpful for unbricking my KPW.

[knc1]

Originally Posted by szfisher

Hi, geekmaster

Can you tell me how to reset the boot counter manually via serial?

How do you enter Login Prompt from fastboot?

It is very helpful for unbricking my KPW.

(1) same command as you quoted above
(2) you don't

[szfisher]

Originally Posted by knc1

(1) same command as you quoted above
(2) you don't

I cann't get into Login Prompt from fastboot, so I don't know where I input the command.

[dsmid]

From fastboot you can flash the diags partition with an image containing USBnet/sshd support.
Then you can use fastboot to boot into diags, activate USBnet, use ssh client to log in from PC via USB and input any commands you like (preferably after mounting mmcblk0p3 partition first).

[knc1]

Originally Posted by szfisher

I cann't get into Login Prompt from fastboot, so I don't know where I input the command.

Your statement:

Can you tell me how to reset the boot counter manually via serial?

The only thing "serial" on the device is the operator's console, serial port.

It is a command line interface (**THE** command line interface via hardware).
Type the commands there.
Connecting to the serial port is index in the Prefix_Index for all model Kindles.

[hawhill]

I think a hint towards Kubrick seems to be in order :-) szfisher - depending on what you want to do (not clear to me), you might want to checkout Kubrick (in the sticky threads in this board).

Edit: I see that more requests are scattered over other threads now. It's still not clear to me, but it seems we're talking about a KPW, not a KT. So no Kubrick then...

[szfisher]

Originally Posted by hawhill

I think a hint towards Kubrick seems to be in order :-) szfisher - depending on what you want to do (not clear to me), you might want to checkout Kubrick (in the sticky threads in this board).

Edit: I see that more requests are scattered over other threads now. It's still not clear to me, but it seems we're talking about a KPW, not a KT. So no Kubrick then...

Yes, we're talking about unbricking a KPW via serial port. I have updated the root partition by recovery menu, but I don't know how to get into command line to clear boot counter. Unless I clear the counter, KPW always boots into Need Repaired screen.

[szfisher]

Originally Posted by knc1

Your statement:


The only thing "serial" on the device is the operator's console, serial port.

It is a command line interface (**THE** command line interface via hardware).
Type the commands there.
Connecting to the serial port is index in the Prefix_Index for all model Kindles.

If I don't get into command line interface, I cann't type any line command. What I can do is selecting menu.

[hawhill]

dsmid already suggested to boot diags, but I'm not sure if that applies to the KPW. You should really edit your Device entry in your user signature...

That said, I know that knc1 said otherwise in the other thread, but option "3. Load MMC0 over USB storage" sounds like it would export the full device including all partitions, allowing you to edit files on the /var partitions (from a Linux system, I guess). Maybe knc1 can comment why he thought that it would not be wise to chose that. Does it something different? Out of interest, what does option "q" trigger for you?

[szfisher]

Originally Posted by hawhill

dsmid already suggested to boot diags, but I'm not sure if that applies to the KPW. You should really edit your Device entry in your user signature...

Thanks, I finally enter the command line by following rastik's step:

- attach serial cable
- boot
- immediately after restart enter any key to stop autoboot
- enter "bist" and then "fastboot"
- via fastboot tool flash diags partitions on PC
- reboot
- immediately after restart enter any key to stop autoboot
- enter "run bootargs_diags ; bootm 0xE41000" to boot to diags
- get login prompy (menu "D) Exit, Reboot or Disable Diags" and then "L) Exit to login prompt")
- login as root (password:fiona2bc)

Haha! The command line is here, you can type command as you like.

[ixtab]

Originally Posted by szfisher

Thanks, I finally enter the command line by following rastik's step:

- attach serial cable
- boot
- immediately after restart enter any key to stop autoboot
- enter "bist" and then "fastboot"
- via fastboot tool flash diags partitions on PC
- reboot
- immediately after restart enter any key to stop autoboot
- enter "run bootargs_diags ; bootm 0xE41000" to boot to diags
- get login prompy (menu "D) Exit, Reboot or Disable Diags" and then "L) Exit to login prompt")
- login as root (password:fiona2bc)

Haha! The command line is here, you can type command as you like.

If you can, please add this information to https://wiki.mobileread.com/wiki/Kindle_Touch_Hacking at the appropriate position (=where you see fit) , so it doesn't get lost - thanks!

[szfisher]

Originally Posted by ixtab

If you can, please add this information to https://wiki.mobileread.com/wiki/Kindle_Touch_Hacking at the appropriate position (=where you see fit) , so it doesn't get lost - thanks!

Thanks! My complete steps to unbrick KPW via serial port is here:
https://www.mobileread.com/forums/sho...=206767&page=2
OK, I have added it to that wiki page "Unbricking".