Coby Kyros MID1042 Problem

Discussion in 'Coby Generation 3' started by mvancil, Dec 26, 2012.

  1. mvancil
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    mvancil Junior Member

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    I have a Coby Kyros MID1042 that has a corrupted Superuser.apk

    I have attempted to reset to factory and to re-root using ADB. This has failed, because the file already exists and all of the rooting tools (and manual attempts) to copy the file will not overwrite the existing. I am able to boot the tablet as normal and I can access the system recovery, but I cannot use any of the custom roms because they fail signature verification. I cannot upgrade the rom manager because I can't get root.

    So....my question is this....does anyone have the stock rom for the MID1042 that will pass signature verification? Or any other rom for that matter that will pass?
    Last edited: Dec 26, 2012
  2. vampirefo.
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    vampirefo. Senior Member Developer

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    Use adb to root your device, then use adb to replace Superuser.apk.
  3. mvancil
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    mvancil Junior Member

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    As stated before....that didn't work.
  4. vampirefo.
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    vampirefo. Senior Member Developer

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    no way it can't work, you are simply do it wrong, post exact commands you are using.
  5. mvancil
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    mvancil Junior Member

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    It's absolutely does not work. I do know what I'm doing. The problem is that it will not overwrite any files that already exist, and I cannot erase them without root access. Here's an example of the commands issued...

    adb.exe push data /data/local/tmp/
    adb.exe shell chmod 0777 /data/local/tmp/mempodroid
    adb.exe shell /data/local/tmp/mempodroid 0xd7cc 0xad27 sh /data/local/tmp/root.sh
  6. mvancil
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    mvancil Junior Member

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    I also attempted to use the -f flag to force the overwrite, but that doesn't work.
  7. mvancil
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    mvancil Junior Member

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    Oh....and the root script...

    busybox mount -o remount,rw /system


    cd /data/local/tmp
    busybox cp su /system/xbin/su
    busybox cp reboot-recovery /system/bin/reboot-recovery
    chmod 755 /system/bin/reboot-recovery
    chown 0:0 /system/xbin/su
    chmod 6755 /system/xbin/su
    busybox ln -sf /system/xbin/su /system/bin/su


    busybox cp Superuser.apk /system/app/Superuser.apk
    chown 0:0 /system/app/Superuser.apk
    chmod 0644 /system/app/Superuser.apk
  8. vampirefo.
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    vampirefo. Senior Member Developer

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    adb shell

    su

    mount -o remount,rw /system

    rm -r /system/app/Superuser.apk
  9. mvancil
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    mvancil Junior Member

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    adb server is out of date. killing...
    * daemon started successfully *
    shell@android:/ $ su
    su
    Segmentation fault
    139|shell@android:/ $ mount -o remount,rw /system


    rm -r /system/app/Superuser.apkmount -o remount,rw /system


    mount: Operation not permitted
    255|shell@android:/ $
    255|shell@android:/ $
  10. vampirefo.
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    vampirefo. Senior Member Developer

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    ok so you aren't rooted, you need root to remove /system files.
  11. mvancil
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    mvancil Junior Member

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    It was rooted...the files are now corrupted...hence the need for original post.

    Unless you know a way to force an overwrite while rooting?
  12. vampirefo.
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    vampirefo. Senior Member Developer

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    your su binary appears to be corrupt, once you become root $ changes to #
  13. vampirefo.
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    vampirefo. Senior Member Developer

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    rooting has nothing to so with Superuser.apk, you must be root before you can even push the Superuser.apk.
  14. mvancil
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    mvancil Junior Member

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    We still have yet to hit on anything I didn't already know.
  15. vampirefo.
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    vampirefo. Senior Member Developer

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    adb push data /data/local/tmp/

    adb shell

    chmod 0777 /data/local/tmp/mempodroid

    /data/local/tmp/mempodroid 0xd7cc 0xad27 sh /data/local/tmp/root.sh

    su

    $ should now change to #
  16. vampirefo.
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    vampirefo. Senior Member Developer

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    drop the attitude, I am not required to offer you any help, an wont help people with attitudes.
  17. mvancil
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    mvancil Junior Member

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    The "No space left" error is it being unable to overwrite existing files...

    C:\coby_root3>adb push data /data/local/tmp/
    push: data/Superuser.apk -> /data/local/tmp/Superuser.apk
    push: data/su -> /data/local/tmp/su
    push: data/root.sh -> /data/local/tmp/root.sh
    push: data/recovery.img -> /data/local/tmp/recovery.img
    push: data/reboot-recovery -> /data/local/tmp/reboot-recovery
    push: data/mempodroid -> /data/local/tmp/mempodroid
    push: data/install-recovery.sh -> /data/local/tmp/install-recovery.sh
    7 files pushed. 0 files skipped.
    3310 KB/s (10797409 bytes in 3.185s)


    C:\coby_root3>adb shell
    shell@android:/ $ chmod 0777 /data/local/tmp/mempodroid
    chmod 0777 /data/local/tmp/mempodroid
    shell@android:/ $ /data/local/tmp/mempodroid 0xd7cc 0xad27 sh /data/local/tmp/ro
    ot.sh
    7cc 0xad27 sh /data/local/tmp/root.sh <
    rooting...
    cp: write error: No space left on device
    cp: write error: No space left on device
    cp: write error: No space left on device
    shell@android:/ $ su
    su
    Segmentation fault
    139|shell@android:/ $
  18. mvancil
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    mvancil Junior Member

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    This is why I was asking if anyone has a signed recovery file that I can use with the native recovery.
  19. vampirefo.
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    vampirefo. Senior Member Developer

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    ok your system is full no room to write, your su is corrupt not Superuser.apk,

    Do you already have cw recovery installed?
  20. vampirefo.
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    vampirefo. Senior Member Developer

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    ok so you don't have cw recovery installed?

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