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Thread: Impossible to get OTA

  1. #11
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    May 2016
    3 times

    Quote Originally Posted by Andrew_b View Post
    thanks for welcome !
    the procedure:
    1) download stock firmware from asus site (WW_V2.2.33.101 in my case)
    2) perform a first unzip to obtain
    3) I work with embedded linux at work for many years, I can't live without bash shell. install SSH server, I used SSHDroid for example. With the linux shell we can fully control what happen (system logs are great !)
    Now if you try to rename the filename to and copy it to microSD, the new firmware is detected and we can start update procedure.
    but when the system rebot in recovery mode the process fail due a revision check (101 is less than 135 in my case). Now logs... the check is performed by controlling "" variable.
    I try to change the file /system/build.prop (the only text file with this variable) but nothing;101 is always less than 135. Obviously this environment var is stored on recovery partition filesystem.
    So we need to overwrite this partition with those present on
    It is not possible to overwrite recovery from recovey itself. we need to do that when the tablet is running android.
    before that just to be sure, to be in no doubt, I overwrited my 135 kernel with the 101, but might not even be necessary.
    to do that, execute "fastboot flash boot boot.img" (boot.img from from recovery with USB cable PC connection.
    extract recovery directory from to a directory of the tablet, for example tmp.
    now when logged with SSH shell execute the /tmp/recovery/etc/ script.... the recovery partition is now replaced with the older one.
    4) rename; copy to microSD and the update procedure now ends without error.
    5) perform wipe cache and wipe data !
    to manually execute all OTA updates from 101 to 138 read patates post at [Q] Asus Transformer Pad TF103C Tablet - Roo… - Pg. 6 | Android Development and Hacking | XDA Forums
    I hope I was helpful.
    for any questions ask..
    PS: why no official GOTA notify with stock 101 firmware ? I don't understand.. after first OTA failure (138 in my case) no notify anymore.
    This also worked for me. My tablet wouldn't boot - it would freeze at the ASUS logo - so my procedure was slightly different.

    I extracted the files under /recovery from the latest official Asus KitKat firmware 1st I had to boot into droidboot/fastboot mode (Vol up+Power for 3 seconds until the screen turns on). Then I had to connect the tablet to usb/laptop, use the Intel Recovery IntelAndroid-FBRL-07-24-2015/launcher.bat, select any TWRM or CWM option, then T2 (T2/T3/T4 all work) - this puts the device into ADB mode. The screen will go blank but ADB commands will work. From here I did the adb push and adb shell to chmod +x the files. Note I also had to adb push recovery-from-boot.p /system/ to overwrite the system one, as looks for it under /system/. Upon executing (adb shell) /tmp/recovery/etc/, it successfully updated my droidboot/recovery to v144, and I was able to access Recovery again (from droidboot, select Recovery .. once the dead android appears on the screen, hold vol+&vol- for 3 seconds.. you may have to try holding down +/- quite a few times before you get into the recovery mode menu).

    Intel recovery link: Intel Android Devices Root / Temp Recovery S… | Android Development and Hacking
    Last edited by aslezak; 05-16-2016 at 12:46 PM.


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