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  1. #1
    Soundwave
    Member #
    57319
    Join Date
    May 2013
    Tablet
    TF300T
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    Help for a bricked TF300T [bootloader, adb & fastboot access still OK]

    Hi All,

    I apologize in advance for my stupidity but my TF300T is stuck in a boot loop AND this is all my fault : power on -> CWM 6.0.2.3 [not functional ... i should have installed TWRP instead ... i've learned that too late ... i can't do anything with this recovery => i can't mount any storage] -> reboot -> CWM ... etc ...

    The good part is that the recovery gives me adb access to the device : 'adb reboot-bootloader' reboot the TF300T into the JB 4.2 bootloader which gives me fastboot access to it ... BUT 'sudo fastboot -w' hangs after begin the wiping of the cache partition [second partition in the wiping process] and 'sudo fastboot reboot' hangs it too after running an apparently successfull command like 'sudo fastboot flash recovery twrp-42.blob' [everything is OK but when i reboot the tablet i'm still in CWM !!!] or any other fastboot command; so fastboot is not fully functional on my bricked device.

    Does anybody know if there is a way to use adb shell to totally wipe the internal storage of my TF300T and then re-partition it correctly ? Because it's totally messed up ... without the 'su' binary installed for the moment

    Also, is there any chance to use NVFlash in my case for that purpose : wipe the internal storage and put back TWRP & latest ASUS stock ROM with root access -> i've read that in my case the use of NVFlash is not possible for the moment because of the version of my unlocked bootloader (from ASUS JB 4.2 OTA)

    Thanks a lot for your help
    Last edited by ne0zone75; 05-26-2013 at 10:18 PM.

  2. #2
    Soundwave
    Member #
    57319
    Join Date
    May 2013
    Tablet
    TF300T
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    Hello,

    Here is the output of 'adb shell ls /dev/block' :
    Code:
    loop0      loop2      loop4      loop6      mmcblk0p3  sda
    loop1      loop3      loop5      loop7      platform/  sda1
    I have a SDCARD formated in FAT32 in the SDCARD slot of the dock ...

    And 'adb shell cat /etc/fstab' gives me the following output :
    Code:
    /dev/block/mmcblk0p2 /cache ext4 rw
    /dev/block/mmcblk0p8 /data ext4 rw
    /dev/null /emmc datamedia rw
    /dev/block/mmcblk0p1 /system ext4 rw
    /dev/block/mmcblk1p1 /sdcard vfat rw
    Finally 'adb shell cat /proc/mounts' :
    Code:
    rootfs / rootfs rw 0 0
    tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
    devpts /dev/pts devpts rw,relatime,mode=600 0 0
    proc /proc proc rw,relatime 0 0
    sysfs /sys sysfs rw,relatime 0 0
    I'm still stuck in CWM 6.0.2.3 boot loop and i have no root access !

    So i have several questions :

    -> Is my TF300T definitely bricked ?
    -> Can i use my SDCARD loaded with 'EP201_768_SDUPDATE.zip' by shutting off the tablet, restart it while holding VOL UP + POWER buttons to perform a STOCK ROM recovery according to that guide : guide-how-manually-update-restore-firmware-tf700-tf300-tf101-possibly-tf201
    -> How to gain root access in my case ? In order to 'dd if=/[twrp or latest ASUS ROM] (blob file format) of=/dev/block/mmcblk0p4 then cold boot and pray ...

    Lastly 'sudo fastboot getvar all' prints :
    Code:
    (bootloader) version-bootloader: 1.0
    (bootloader) version-baseband: 2.0
    (bootloader) version: 0.4
    (bootloader) serialno: 015d262e0d241805
    (bootloader) mid: 001
    (bootloader) product: Cardhu
    (bootloader) secure: yes
    (bootloader) unlocked: no
    (bootloader) uart-on: yes
    (bootloader) partition-size:bootloader: 0x0000000000800000
    (bootloader) partition-type:bootloader: basic
    (bootloader) partition-size:recovery: 0x0000000000800000
    (bootloader) partition-type:recovery: basic
    (bootloader) partition-size:boot: 0x0000000000800000
    (bootloader) partition-type:boot: basic
    (bootloader) partition-size:system: 0x0000000030000000
    (bootloader) partition-type:system: ext4
    (bootloader) partition-size:cache: 0x000000001ac00000
    (bootloader) partition-type:cache: ext4
    (bootloader) partition-size:userdata: 0x00000006e5680000
    (bootloader) partition-type:userdata: ext4
    Any help will be greatly appreciated,

    Have a nice day
    Last edited by ne0zone75; 05-26-2013 at 10:23 PM.

  3. #3
    Soundwave
    Member #
    57319
    Join Date
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    TF300T
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    Hey ! I think i managed to get root ... here is what i did : i unpacked blob from latest official rom using blobunpack tool, it created a blob.APP file among others and i renamed it system.img; then i've put 'UPDATE-SuperSU-v1.30.zip' in a fat16 image file using the 'dd' and mkdosfs commands after mounting it using 'mount -o loop ...'

    Then i ran :
    Code:
    adb push supersu / (supersu is the image file with the .zip file inside)
    adb push system.img /
    adb shell
    ~ # mount -o loop system.img /system
    ~ # mount -o loop supersu /sdcard
    So, from that point everything it is like /sytem and /sdcard were correctly mounted normally ... isn't it ?

    Now i can apply 'UPDATE-SuperSU-v1.30.zip' from CWM ... output log is OK but during installation /sytem is unmounted, so i ran again this command in adb shell :
    Code:
    ~ # mount -o loop system.img /system
    Executing the command '/system/xbin/su' gives me the root prompt
    Code:
    root@android:/ #
    Am i really root at this point ??? If someone can tell me it would help ...

    I doubt about being root because from root promt running 'flash_image' or 'dd' command does nothing : i explain myself -> flash_image fails with error code -1 and dd command is successfull but no change to the recovery partition after reboot :
    Code:
    root@android:/root # dd if=/root/twrp.blob of=/dev/block/mmcblk0p4              
    12896+0 records in
    12896+0 records out
    I AM LOST ! thanks for helping me out ...

  4. #4
    Soundwave
    Member #
    59104
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    TF300T
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    Hi,

    Did you manage to solve this problem?

  5. #5
    Guide Guru & Forum Administrator
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    Moved to development

    PLEASE Search for existing threads before posting a new one. Thanks.

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  6. #6
    Soundwave
    Member #
    55008
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    Hello! I have exactly the same problem.
    I've tried so many different ways to solve this, but I'm stuck too.
    Now I have 1 idea. While on adb shell we can't see our partitions. I supposed that the partition system is broken, but when the stock rom was working, I checked that stuff.
    On stock I could see partitions, when reloaded to adb — none of them... so maybe Asus uses something to block access to partitions?
    Unlikely I'm not at home now and I have no cable, but I'll try to do something with that.
    There is another way to repair it — change a motherboard, but it's too expensive.
    Good luck to us!

 

 

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