need help: I select Erase MMC0 in my kindle gen 8 recovery menu..

[cxg2014]

Now it can't boot kernel, it shows :

Hit any key to stop autoboot:  0 
mmc1(part 0) is current device
FRED::: EXTCSD177=0, 179=48BOOTing from mmc ...
mmc1(part 0) is current device

MMC read: dev # 1, block # 720, count 28672 ... 28672 blocks read in 320 msec: OK

MMC read: dev # 1, block # 520, count 256 ... 256 blocks read in 6 msec: OK
Wrong Image Format for bootm command
ERROR: can't get kernel image!
uboot >

what should I do? thanks for any advice

[HarryT]

Moved to the dev forum.

[knc1]

Originally Posted by cxg2014

Now it can't boot kernel, it shows :

Hit any key to stop autoboot:  0 
mmc1(part 0) is current device
FRED::: EXTCSD177=0, 179=48BOOTing from mmc ...
mmc1(part 0) is current device

MMC read: dev # 1, block # 720, count 28672 ... 28672 blocks read in 320 msec: OK

MMC read: dev # 1, block # 520, count 256 ... 256 blocks read in 6 msec: OK
Wrong Image Format for bootm command
ERROR: can't get kernel image!
uboot >

what should I do? thanks for any advice

You should now congratulate yourself on proving that 'erase all' does exactly what the label says.
What else did you expect it to do?

Now learn how to use the 'search' features and 'prefix filter' features of this forum if the various sticky topic threads do not help you. Threads like "Where do I start?"
Solutions to your situation are well documented and described here.

[cxg2014]

Originally Posted by knc1

You should now congratulate yourself on proving that 'erase all' does exactly what the label says.
What else did you expect it to do?

Now learn how to use the 'search' features and 'prefix filter' features of this forum if the various sticky topic threads do not help you. Threads like "Where do I start?"
Solutions to your situation are well documented and described here.

I'm tring to use fastboot tool to flash kernel, but whatever I do, it always shows me that:

PS C:\Users\cxgre\Downloads\fastboot_win_public (1)> .\fastboot.exe pass
turning on led...
FAILED (command write failed (No error))
finished. total time: 0.001s
PS C:\Users\cxgre\Downloads\fastboot_win_public (1)>

[knc1]

Where are the directions that you are following?

[cxg2014]

Um...use fastboot to flash https://ixtab.tk/kindle-touch-images...kernel_main.gz to my kindle..but it seems like I can't using fastboot flash command on my computer..always shows me that "FAILED (command write failed (No error))"

[HarryT]

Originally Posted by cxg2014

Um...use fastboot to flash https://ixtab.tk/kindle-touch-images...kernel_main.gz to my kindle..but it seems like I can't using fastboot flash command on my computer..always shows me that "FAILED (command write failed (No error))"

Why are you attempting to flash a Kindle Touch kernel image to an 8th generation Kindle? You need to use the correct kernel for your device. Picking a random one isn't going to work!

Tell us the first 4 digits of your Kindle's serial number. That will allow us to identify which model you have.

[baalajimaestro]

@cxg2014: Is boot completely not possible or a Diags boot is possible??

[knc1]

Originally Posted by cxg2014

Um...use fastboot to flash https://ixtab.tk/kindle-touch-images...kernel_main.gz to my kindle..but it seems like I can't using fastboot flash command on my computer..always shows me that "FAILED (command write failed (No error))"

Ah, so -
You ARE NOT following any of our directions, your making them up as you go along.

Follow one of our "Recovery from Erase All" posted guides if you want help here, we only have time to support our own work.

1) It is a good thing that fast boot fails, since you are trying to flash the wrong kernel/system image files.

2) You can't fastboot install a 'main' filesystem image, it is too big.

3) You should install diags kernel and system, the set for your device.

4) Determine which 8th. generation device you have.
You really, really, really need that information.
Note: For an 8th. generation device, we require the first six characters of the device's serial number (not just the first four as advised above).

5) Find, read and study one of our step-by-step guides to fixing this situation.
If you do that, then we can help you.

Otherwise we have no idea what all you have done, and attempting to offer help in an unknown situation is just a waste of our time and yours.

And as you have discovered, just one wrong entry (picking 'erase all') can make a very big difference.

PS: And if you do that, you will discover why your fastboot commands are failing and where to get the current, correct, system image and kernel to use.

@baalajimaestro: "Erase All" means: "everything"
Although some things get restored in the process, the secondary OS is not one of them.

[cxg2014]

S/N: G000K9056*******

Thanks for your help!

[cxg2014]

S/N: G000K9056*******

Thanks for your help!

[knc1]

Originally Posted by cxg2014

S/N: G000K9056*******

Thanks for your help!

The local nickname of that device is: KT3 (Black).

You need to use the most recent KindleTool build, found here:
https://www.mobileread.com/forums/sh...d.php?t=225030

u-boot, kernel and file system image for the 'main' OS -
Go to this post:
https://www.mobileread.com/forums/sh...d.php?t=275877
Scroll down to Step #7, open the spoiler, in the section "KT3" download the Amazon update package for the firmware version you want to install.
Of the versions that can be jailbroken, you have 4 choices.
Plus another 3 choices of version that can not be jailbroken, which does not matter since you already have a serial port connection setup.
Those other 3 choices are not listed, just copy the URL of the most recent one listed, then change the version number string in the URL to your choice of 5.8.8, 5.8.9 or 5.8.9.2

Use the copy of KindleTool you just down loaded to convert the Amazon update package to a compressed archive, where you can find the files mentioned above.

Go to this thread:
https://www.mobileread.com/forums/sh...d.php?t=269099
Those are the instructions to recover from the 'erase all' situation.
It is a bit wordy, since we (MadMAXXX and I) had to invent the process as we went along.
And it will have some off topic posts in it that you can ignore.
For a clear picture of what to expect, open and read the attachments (log files).

Be certain you are using the "Kindle Special" fastboot client.
The start of its description is here:
https://www.mobileread.com/forums/sh....php?p=2000997
follow along in the remaining posts of that thread to be sure you get the most recent build posted.
That will be for 32-bit Windows.
There is also a build for Linux somewhere here, if you need that instead, search for it.

When done, you will have a working KT3 with only the 'main' OS installed, no secondary ('diags') OS (the Kindles are dual system boot devices).
When you have all of that done according to the description, PM me and I will figure out how you can get your hands on a KT3 'diags' kernel and filesystem image.

Unless you want to do something really strange, like install google chromebook as the secondary OS.
In that case your on your own.

[cxg2014]

I think I fall in love with you~Haha~Thank you very much

[cxg2014]

I get uImage file now, but when I tried to execute 'fastboot flash kernel uImage', it shows that:

FAILED (command write failed (No error))
finished. total time: 0.001s

[knc1]

Originally Posted by cxg2014

I get uImage file now, but when I tried to execute 'fastboot flash kernel uImage', it shows that:

FAILED (command write failed (No error))
finished. total time: 0.001s

You really need to provide context with your reports.
We can't guess at what all you have done outside of what you write.

You still owe us some answers that you have not posted yet.

You don't tell us the link that you pulled the version of fastboot from that you are using and if you built it from source or are using a binary.

You still have given us no idea of whose directions you are following or what your final objective is.

Note: You can't be doing something that will result in closed source code if you expect help from the members of this forum.
It is a very simple to understand exchange:
You share with us and we share with you or you just go away and don't waste our time on your private, personal problem.