KV KV stuck on "DIAGS EXIT Please use serial port" page

[oumlaut]

Originally Posted by shamanNS

I've done quick test on my PW3 (so, not the same device I know) with firmware 5.9.7 (originally jailbroken while on fw 5.6.5, RP + CRP installed at the same time ; newer versions RP & CRP bin installers downloaded and installed sometimes in last 2 months).

Thank you. My jailbreaked device was running on firmware 5.10.3 that has a newer diags menu, which doesn't bear any importance at the moment.

[oumlaut]

Originally Posted by knc1

So use the serial port.

I didn't have the slightest idea how to until today. @noismaster's "Kindle Voyage 5.6.2.1 Serial Jailbreak Step-by-Step" seems to be good guide: https://www.mobileread.com/forums/sh....php?p=3137590

Originally Posted by knc1

Follow the directions for using pins (no hot solder solution) since you will only need the serial port long enough to type a couple of commands.

As in detailed in @DennisH's guide? https://www.mobileread.com/forums/sh....php?p=3205506

I don't have the necessary tools to give it a try. I believe we suppose that I can get access to the command line on the device if I can manage to connect on the serial port.

[radualexandru]

Hello,

I think my problem is related to what is happening in this thread.
I have a kindle DX, with the firmware 2.5.8. I have tried to eable DIAGS mode and I am stuck with a message on the screen so I cannot use my kindle anymore. (see photo with the link)
It says press X to exit, but it just restarts and comes back to the same.

Some help, please...
(Maybe the solution is already in the thread, but I am a newbie in this, so I didn't hurry to suppose.)

Thank you!

https://drive.google.com/file/d/0B7s...vRDlLaFdR/view

[NiLuJe]

No, completely unrelated. A DX is not a Voyage.

I don't even recall how diags is supposed to behave on a DX. Are you sure this thing was never mangled with a FW 3.x FW?

[radualexandru]

Originally Posted by NiLuJe

No, completely unrelated. A DX is not a Voyage.

I don't even recall how diags is supposed to behave on a DX. Are you sure this thing was never mangled with a FW 3.x FW?

Thank you for reply. I don't know what FW 3.x FW is. I bought it second hand and it is a demo only version. Before this Diags event happened I restored it to factory settings. If this is relevant.

[NiLuJe]

So you basically have no idea what might have been done to it. Yeaaaah, I wouldn't get my hopes up .

[knc1]

Originally Posted by radualexandru

Thank you for reply. I don't know what FW 3.x FW is. I bought it second hand and it is a demo only version. Before this Diags event happened I restored it to factory settings. If this is relevant.

It is relevant.
IIRC, the on-device firmware is not complete enough to "restore to factory settings" when in "Demo Mode" (on a series 2.x device (your post) where a series 5.x device (thread title) will download the missing files).


It would be best if you followed the posted directions to exit from "Demo Mode" first, before doing anything else.


You may have to do full text searches of all posts in "Demo Mode" related threads, since the person who posted the information may have posted it in a thread titled for an entirely different device.

[radualexandru]

Hi,

The person who gave it to me said it is not in demo mode, it should work like any KDXG. Also, 2 years ago I remember connecting it to the computer as a monitor (with the whole procedure).
Another thing, I have seen today it is recognised by Windows as a device but I cannot access the files.

Help, please...

[oumlaut]

Originally Posted by oumlaut

Having spent quite some time on the forum, I began to suspect that KV is stuck in fastboot mode.

Just as I have suspected, my Kindle Voyage was in fastboot mode.

[  312.807008] usb 2-2-2: pl2303 converter now attached to ttyUSB0
og@ubuntu:~$ sudo minicom

Welcome to minicom 2.7.1

OPTIONS: I18n
Compiled on Aug 13 2017, 15:25:34.
Port /dev/ttyUSB0, 00:29:21

Press CTRL-A Z for help on special keys

����Battery voltage: 3806 mV
Battery voltage: 3803 mV
HW


U-Boot 2009.08-lab126 (Dec 04 2018 - 17:09:30)

CPU: Freescale i.MX6 family TO0.0 at 996 MHz

[...]

In: serial
Out: serial
Err: serial
Quick Memory Tes 0x800000000, 0x1fff0000
POST done in 111 ms
BOOTMODE OVERRIDE: FASTBOOT
Battery voltage: 3794 mV

check_haptic: ID = 0x07
Hit any key to stop autoboot: 0
uboot>

Running the proper command took me directly back to System Diags on the Kindle.

uboot> bootm 0xE41000
## Booting kernel from Legacy Image at 80800000 ...
   Image Name: Linux-3.0.35-lab126

The rest was easy as should be. First:

(o)-Reboot or Disable Diags

Then:

(EXIT DISABLE)-Disable Diagnostics

I couldn't get Prolific's PL2303 driver to work on macOS Mojave Version 10.14.4. Otherwise, minicom is available for macOS via Homebrew. Thus, I opted for an Ubuntu 64-bit 18.04.2 VMware virtual machine. All necessary information for minicom setup and the rest is already provided by @noismaster on the related thread.

I used an inexpensive 1.8V USB to TTL Serial Cable, three extensions, three crocodiles, two pins, and quite an unsophisticated modus operandi. See the attached thumbnail.

Further notes: Jailbreak survives the most recent firmware, 5.11.1.1. I have updated all the hacks from @NiLuJe's snapshots. KUAL should be installed via ;log mrpi, though. KUAL-KDK-2.0.azw2 doesn't seem to work.

A final note: If it ain't broke don't fix it.