[BOOTLOADER] 2nd-bootloader for Custom ROMs on KFireHD 7" [06/24 CM12.1/TWRP 2.8.7.0]

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boringfrog

Senior Member
May 5, 2012
69
2
Sunderland
Finally got it done this is very detailed.
HAVE fast boot cable ready home made worked great also having firehd was extremely helpful to ease the process.
NOTE for fast boot enter command into command prompt for first command into command prompt with tablet off.
Then enter fastboot command in command terminal when it says awaiting for device plug in fsstboot cable turn tablet on when that command completes then enter next command wait for completion and then next fast boot command...
This is what worked after trying to follow step by step and ending up with a boot looping tablet.
THANKS I can now die a happy man.

Sent from Amazon Kindle Fire HD using xda premium
my

I have done exactly that but I,m stuck at the kindle fire logo boot loop.How long do I need to keep the power,volume up buttons pressed for? Also pushing the stack file,is there a different command line if using windows?
 

Hashcode

Senior Recognized Developer
Sep 3, 2011
3,424
23,730
I have done exactly that but I,m stuck at the kindle fire logo boot loop.How long do I need to keep the power,volume up buttons pressed for? Also pushing the stack file,is there a different command line if using windows?

Did you get any errors during the process?

Sent from my XT926 using Tapatalk 2
 

r3pwn

Inactive Recognized Developer
Jul 11, 2012
1,749
2,052
r3pwn.com
you deserve a cookie or two.

Really? Unless cookies are equal to at least two hundred dollars wherever you are, I'd say he deserves more than just two cookies. Maybe another device to work on then get stuck in an infinite loop of getting devices until he has all android devices ever and develops at least 5 things for each of then and becomes dictator of the world and is worshipped by all. As stated by Katalystik, good job, Hash!

Sent from my Amazon Kindle Fire HD using xda app-developers app
 

Katalystik

Senior Member
Jan 6, 2013
89
11
Really? Unless cookies are equal to at least two hundred dollars wherever you are, I'd say he deserves more than just two cookies. Maybe another device to work on then get stuck in an infinite loop of getting devices until he has all android devices ever and develops at least 5 things for each of then and becomes dictator of the world and is worshipped by all. As stated by Katalystik, good job, Hash!

Sent from my Amazon Kindle Fire HD using xda app-developers app
I'm currently residing in Germany after the war, does that count? A million deutchsmark do?
 

raj3366

Senior Member
Sep 30, 2012
107
41
Reply to soupmagnet questions

I am extremely sorry for the delay. I didn't find out yet how to get notified if someone posts a reply to my message. So I missed seeing your question on time.

1) Where did you get the "fastboot.exe" that you are using to execute fastboot commands (KFU?, Android SDK?, Kindle Fire First Aide?, etc.)?
- I used Mac (10.8.4) + android sdk.
$ adb version
Android Debug Bridge version 1.0.31

Android sdk: adt-bundle-mac-x86_64-20130219

2) What tutorial/method/tool/whatever did you use to install your drivers?
- I installed the drivers using the Mac installer (just followed the procedure to install android sdk (http://developer.android.com/sdk/index.html)).

For rooting the device, I used "Root_with_Restore_by_Bin4ry_v18". Since I did not have a fastboot cable, I had to root to boot into fastboot using the below command:
adb shell su -c "reboot bootloader"

I used the same for my previous kindle when the kindle had 7.1 version. I did not face any issues. It was very smooth. But I had 7.4.3 running already when I tried on the new kindle.

Please let me know if you need more information. I am willing to provide (even execute commands to get what is required) whatever information you need.

And thanks for all your hard work. :good:
 

Hashcode

Senior Recognized Developer
Sep 3, 2011
3,424
23,730
I am extremely sorry for the delay. I didn't find out yet how to get notified if someone posts a reply to my message. So I missed seeing your question on time.


- I used Mac (10.8.4) + android sdk.
$ adb version
Android Debug Bridge version 1.0.31

Android sdk: adt-bundle-mac-x86_64-20130219


- I installed the drivers using the Mac installer (just followed the procedure to install android sdk (http://developer.android.com/sdk/index.html)).

For rooting the device, I used "Root_with_Restore_by_Bin4ry_v18". Since I did not have a fastboot cable, I had to root to boot into fastboot using the below command:
adb shell su -c "reboot bootloader"

I used the same for my previous kindle when the kindle had 7.1 version. I did not face any issues. It was very smooth. But I had 7.4.3 running already when I tried on the new kindle.

Please let me know if you need more information. I am willing to provide (even execute commands to get what is required) whatever information you need.

And thanks for all your hard work. :good:

Can you run an md5sum on the bootloader file you are using?
 

raj3366

Senior Member
Sep 30, 2012
107
41
Can you run an md5sum on the bootloader file you are using?

Yes, I ran the md5sum on all the files (including 7.2.3.bin) and verified them. Anyways, here they are:
MD5 (kfhd7-freedom-boot-7.4.3.img) = 137efc9e38aaa12c072d2270902a5fc7
MD5 (kfhd7-twrp-2.6.0.0-recovery.img) = c9e3469a4ce2c9402f57e7777082595c
MD5 (kfhd7-u-boot-prod-7.2.3.bin) = bb029673d8f186db4dff6d38f4aa28cf
MD5 (stack) = 3cee2b7f3233fc3a1e10373677b8c1a9

EDIT: Btw, just to be sure, I was able to get the boot loader working. I was just answering the questions posted by soupmagnet for debugging purpose in my post above.
 
Last edited:

boringfrog

Senior Member
May 5, 2012
69
2
Sunderland
Did you get any errors during the process?

Sent from my XT926 using Tapatalk 2
Went back to stock this morning then tried again, I think I might have missed the second command out after pushing the stack file to the device, looking good now and in TWRP recovery. Do I really need to install the pre rooted stock amazon OS if i'm going to install CM10?
 

Onoitsu2

Senior Member
May 4, 2013
103
52
USA
Moto G Power (2021)
Went back to stock this morning then tried again, I think I might have missed the second command out after pushing the stack file to the device, looking good now and in TWRP recovery. Do I really need to install the pre rooted stock amazon OS if i'm going to install CM10?

I did not need to do so for cm10.1, but if going to say kinology you do need stock in place. All I did was wipe well everything twrp let me (except sdcard), then installed the zips.

Sent from my KFTT using Tapatalk 4 Beta
 

bstapley

Senior Member
Jul 7, 2009
88
15
I was asked by a friend to get Cyanogenmod on his Kindle Fire 7 HD, but am having issues with the stack command. Currently the Kindle is running version 7.4.3:

C:\android-sdk-windows\tools>adb push stack /data/local/tmp/
2000 KB/s (4096 bytes in 0.002s) <-----works successfully

C:\android-sdk-windows\tools>adb shell su -c "dd if=/data/local/tmp/stack of=/de
v/block/platform/omap/omap_hsmmc.1/by-name/system bs=6519488 seek=1"
error: protocol fault (status 30 2b 31 20?!)

I've tried changing the stack file to be pushed to /data/local and /sdcard and all have the same error error: protocol fault (status 30 2b 31 20?!).

I later followed the recommendation by Hashcode to try the following:

C:\android-sdk-windows\tools>adb root
adbd cannot run as root in production builds

but as you can see, it will not allow me to get root. I've verified that root functions properly via:

C:\android-sdk-windows\tools>adb shell
shell@android:/ $ su
su
shell@android:/ #

and via terminal and root checker apps installed in the KF.

What's am I missing here? Any help would be much appreciated. Thanks!
 

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  • 122
    [BOOTLOADER] 2nd-bootloader for Custom ROMs on KFireHD 7" [06/24 CM12.1/TWRP 2.8.7.0]

    Introducing: Kindle Fire 2nd-bootloader + TWRP 2.8.x.x for the Kindle Fire HD 7

    *** USE AT YOUR OWN RISK! WHILE I TRY MY BEST TO PROVIDE WORKING KERNELS/ROMS, I AM NOT RESPONSIBLE IF THIS SOFTWARE OR ANYTHING I'VE WORKED ON SUDDENLY FRIES YOUR DEVICE. ***

    ** THESE FILES WILL ONLY WORK ON A KINDLE FIRE HD 7 **

    ** WHEN MODDING THE KFIRE HD YOU SHOULD HAVE WORKING FASTBOOT DRIVERS/ACCESS ON YOUR PC. **


    LOOKS LIKE NOT ALL FASTBOOT CABLES WILL AUTOMATICALLY PLACE YOU IN FASTBOOT MODE ON THE KINDLE FIRE HD 7. DOWNLOAD THE ANDROID SDK AND GO FROM THERE.
    http://developer.android.com/sdk/index.html

    Here's 1 website you can purchase a FASTBOOT adapter from (works with your normal USB cable)
    http://shop.teamblackhat.info/Factory-Adapters-motadapt.htm
    ** I don't make any commission or fee from the sales of these devices, I just know they have them on stock most of the time and ship in a reasonable time frame unlike the Chinese variants found on ebay.

    Q: How do I know if my fastboot works?
    A: With the Kindle powered down, type the following command into a cmd/terminal window on your PC (should return with: < waiting for device> ):
    fastboot -i 0x1949 getvar product

    Then connect your fastboot cable to the Kindle and reboot. It *SHOULD* show a Fastboot screen and your terminal window should show something like:
    product: Tate-XXX-XX (something here)

    Type this to reboot out of fastboot mode:
    fastboot -i 0x1949 reboot


    ** IF YOU HAVE QUESTIONS, RE-READ THROUGH THE THREAD FOR ANSWERS. WHEN YOU'RE ABSOLUTELY SURE NO ONE HAS ASKED YOUR QUESTION, GO AHEAD AND RE-READ THE THREAD AGAIN AND USE THE SEARCH FEATURE. THEN POST YOUR QUESTION IF YOU STILL CAN'T FIND THE ANSWER **



    INSTRUCTIONS FOR INSTALLING A 2ND-BOOTLOADER TO LOAD CUSTOM KERNELS / ROMS / RECOVERY:
    *** BE SURE YOU HAVE A GOOD CHARGE ON THE DEVICE ***

    STEP 1. Backup your stock partitions to your own HD for later if you need disaster recovery:
    Code:
    adb shell su -c "dd if=/dev/block/mmcblk0boot0 of=/sdcard/boot0block.img"
    adb shell su -c "dd if=/dev/block/platform/omap/omap_hsmmc.1/by-name/boot of=/sdcard/stock-boot.img"
    adb shell su -c "dd if=/dev/block/platform/omap/omap_hsmmc.1/by-name/recovery of=/sdcard/stock-recovery.img"
    adb shell su -c "dd if=/dev/block/platform/omap/omap_hsmmc.1/by-name/system of=/sdcard/stock-system.img" # This will take a few minutes
    adb pull /sdcard/boot0block.img
    adb pull /sdcard/stock-boot.img
    adb pull /sdcard/stock-recovery.img
    adb pull /sdcard/stock-system.img # This will take a few minutes
    Take those files and put them somewhere safe.

    **** MAC USERS MAY NEED TO SPARSE THE FILES FOR RE-FLASHING TO THE DEVICE. I NEED A MAC USER TO PROBABLY WORK THROUGH THAT PROCESS AND POST BACKUP COPIES OF THE STOCK PARTITIONS FOR DISASTER RECOVERY ****


    STEP 2: Download the files you will need to install 2nd-bootloader, TWRP and CM:

    ON THE FOLLOWING DEV-HOST LINKS
    USE THE BLUE "DOWNLOAD NOW" BUTTON
    -- DO NOT INSTALL AN EXECUTABLE DOWNLOADER TO YOUR SYSTEM! --
    I'LL LOOK FOR A BETTER HOST WHEN I GET MORE TIME.

    1. Stack override file:
      Mirror 1: Download "stack" from Dev-Host
    2. [12/09] kfhd7-freedom-boot-7.4.6.img (USED ONLY THE FIRST TIME -- .zip files will have their own boot.img's from now on):
      Mirror 1: Download "kfhd7-freedom-boot-7.4.6.img" from Dev-Host
      md5sum: 1628fc4750d0d49cbce41ab616a9d732
    3. [06/24] TWRP 2.8.7.0 recovery flash Image:
      Mirror 1: Download TWRP from Dev-Host
    4. CM-12.1 for the Kindle Fire HD 7 (choose the latest version from):
      Mirror 1: Downloads CM
    5. Google Apps from Android File Host:
      https://www.androidfilehost.com/?w=files&flid=25361 (Use 5.1 version!)
    6. Download the older 7.2.3 bootloader file and flash to your device via fastboot:
      Mirror 1: Download bootloader from Dev-Host
      md5sum bb029673d8f186db4dff6d38f4aa28cf
      (You SHOULD check the md5sum before using fastboot -- downloads CAN be corrupted)
    Place the CM-12.1 ROM and the gapps .zip on your device in the /sdcard area


    STEP 3. Install the stack override in /system:
    ADB commands entered while booted up into STOCK *rooted* Amazon Kindle OS -- May need to enable ADB debugging in Settings:
    [2013-08-21] edited the location where stack is placed on device due to permissions changes
    Code:
    adb push stack /sdcard/
    adb shell su -c "dd if=/sdcard/stack of=/dev/block/platform/omap/omap_hsmmc.1/by-name/system bs=6519488 seek=1"

    STEP 4. Stop the auto recovery update script (this file may or may not be present):
    Code:
    adb shell su -c "mount -o remount,rw ext4 /system"
    adb shell su -c "mv /system/etc/install-recovery.sh /system/etc/install-recovery.sh.bak"
    adb shell su -c "mount -o remount,ro ext4 /system"


    STEP 5:
    [ With the device powered off: connect your FASTBOOT USB cable to the Kindle which should cause it to power on and enter "FASTBOOT" mode. Issue the following commands into your command/terminal window on your PC 1 at a time. ]

    Code:
    fastboot -i 0x1949 flash bootloader kfhd7-u-boot-prod-7.2.3.bin
    fastboot -i 0x1949 flash boot kfhd7-freedom-boot-7.4.6.img
    fastboot -i 0x1949 flash recovery kfhd7-twrp-2.8.7.0-recovery.img
    fastboot -i 0x1949 reboot

    *DONT RE-FLASH FREEDOM-BOOT.IMG LATER AFTER FLASHING CUSTOM ROMS -- IT'S FOR STOCK AMAZON OS ONLY / FIRST INSTALL ONLY*

    ** If everything was done correctly your Kindle will reboot and you will at first see the normal Kindle Fire ORANGE logo and then it will fade and come back as a BLUE logo. **

    TO ENTER RECOVERY:
    Press the left volume button (volume up) while the logo is still YELLOW and keep pressing until the logo turns BLUE. Wait a moment and you should enter recovery.


    STEP 6:
    CM-12.1 AND GAPPS INSTALLATION:
    • (OPTIONAL) Make a backup by selecting "Backup" and then slide your finger to the right on the "Swipe to Back Up"
    • Once complete use the pentagon "Home" icon in the lower left corner of the screen
    • Now, select "Wipe"
    • Swipe the "Swipe to Factory Reset"
    • Use the "Home" icon
    • Select "Install"
    • Browse to the location on your device where you saved the CM-12.1 / GAPPS .ZIP files
    • Select the CM12.1 ZIP file in the list by touching it, then confirm it says the name of the CM-12.1 .ZIP file on the next screen under "File to flash:"
    • Select "Add More Zips"
    • Select the GAPPS ZIP file in the list by touching it -- make sure it says the name of the .ZIP again under "File to flash:"
    • Swipe the "Swipe to Confirm Flash", and wait for it to finish.
    • If the screen is blank at any time you can hit the power button to "wake up" the device
    • Once the flash is done, you'll see a "Home" and "Reboot" buttons at the bottom of the screen
    • Select "Reboot"

    CONGRATULATIONS YOU NOW HAVE THE ABILITY TO INSTALL CUSTOM KERNELS / RECOVERY AND ROMS.


    FLASHING BACK TO STOCK:
    ** FIND THE FILES WE BACKED UP IN STEP #1: ** OR Follow this thread's instructions:
    http://xdaforums.com/showthread.php?t=1951254

    **** MAC USERS MAY NEED TO SPARSE THE FILES FOR RE-FLASHING TO THE DEVICE. I NEED A MAC USER TO PROBABLY WORK THROUGH THAT PROCESS AND POST BACKUP COPIES OF THE STOCK PARTITIONS FOR DISASTER RECOVERY ****

    Plug in your fastboot cable and reboot so that you see the fastboot screen. On your computer go into a prompt and change to the directory where your stock backups are and enter the following commands:
    Code:
    fastboot -i 0x1949 flash boot [B]stock-boot.img[/B]
    fastboot -i 0x1949 flash recovery [B]stock-recovery.img[/B]
    fastboot -i 0x1949 flash system [B]stock-system.img[/B] # This one will take a few minutes
    fastboot -i 0x1949 reboot


    THANKS TO:
    • fattire for finding the original bootloader exploit
    • verygreen for doing some initial work on the 2nd-bootloader and fixing bugs (and letting me copy some of his bootloader installation instructions)
    13
    Changelog: updated 2013-07-08

    freedom boot.img (for use w/ stock Amazon OS + 2nd-bootloader):
    • [07/08] Updated w/ kernel from 7.4.3 release

    Amazon OS .zip:
    • [07/08] Rebuilt on version 7.4.3 from Amazon

    TeamWin Recovery (TWRP) 2.6.0.0

    • [*][07/08] USB Vendor ID / Product ID in recovery now matches stock Amazon OS
    • [07/08] Fixed long pause before recovery entry
    • [07/08] Based on 7.4.3 stock kernel
    • [07/08] Fixed recovery bootloop issue
    • [07/08] Screen timeout feature currently disabled due to screen blanking bug
    • [07/08] TWRP 2.6.0.0 update
    • [07/08] Added "EFS" partition backup option. Normally, don't need to make too many backups of this, but having a backup will enable you to recover HDMI keys, and some other data.
    6
    I added a STEP 6 which is optional but recommended:

    Because we had to drop a 4K file right in the middle of the operating system, there is a chance that we've killed a binary that is used by the OS. As a final "cleanup" step to installing the bootloader, I recommend everyone re-flash the OS to /system. The stack space is pre-allocated during this process so that the files going back onto the /system partition will NOT land on it anymore.

    Download a flashable Amazon OS ROM (7.2.3): Amazon OS 7.2.3: http://goo.im/devs/Hashcode/tate/kfhd7-amazon-os-7.2.3.zip Place this in the /sdcard

    This is the stock Amazon OS which is rooted, has Superuser.apk and busybox. (Users can use this as an easy means of going back to stock the easy way via recovery. It also includes the modified boot.img including the 2nd-bootloader).

    INSTALL THE .ZIP IN TWRP:
    • Select "Install"
    • Use the file manager to browse and click on the "kfhd7-amazon-os-7.2.3.zip" file.
    • Swipe to start.
    • Once that's done, reboot.

    NOTE: Once we start using Jellybean ROMS, the location of "sdcard" can move and to find this file you may need to go "Up a level" to find "data" and then "media" and look for it in there.
    4
    Re: [BOOTLOADER] Install 2nd-bootloader for Custom ROMs on KFireHD 7"

    Can I use install this and still use stock os?

    Sent from my KFTT using XDA Premium HD app

    Yes, that's how the initial install is setup.

    Sent from my DROID RAZR HD using Tapatalk 2
    4
    Re: [BOOTLOADER] Install 2nd-bootloader for Custom ROMs on KFireHD 7"

    Whenever I get around to installing ubuntu or linux on my 2nd hard drive I plan on downloading the sdk, gonna start to try and learn a thing or 2 in the world of android development :D

    Edit: hey hashcode, i just noticed twrp recovery was updated to 2.4, can i just flash it thru fastboot? Or does it need to be modified for the HD7?

    Sent from my KFTT using Tapatalk HD

    The custom recovery and kernels we use on the new Kindle Fires require special modifications or they will break on Amazons signature check.

    I can build a new recovery with the 2.4 update over the next few days. It will probably come in 2 forms:
    - an updated image file for use during the 2nd bootloader installation
    - a flash .zip update for those who are already running custom recovery.

    Sent from my DROID RAZR HD using Tapatalk 2