From mcl rom 201 for 4.1.1 to mcl rom 103 for 4.0.4

Discussion in 'Lenovo IdeaTab A2109 Technical' started by a2109a, Jan 15, 2013.

  1. a2109a

    a2109a Member

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    I want to go back from mcl rom 201 (4.1.1) to mcl rom 103 (4.0.4).

    How are the steps? The tablet is already rooted.

    Do I need to install a2109_cwmrecovery-6.0.1.9c.img ? I had installed a2109_cwmrecovery-6.0.1.9d.img for 4.1.1 already.
     
  2. FloRider

    FloRider Senior Member

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    First you install the ROM, then you flash the cwm version for that ROM. I think it's simply:
    1. Wipe data / factory reset
    2. Install MCL 103.
    3. Flash the 'c' version of cwm.
     
  3. a2109a

    a2109a Member

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    Are you sure it is not the other way round, first cwm and then mcl?

    How do I wipe the data? Do I have to use Volume+ / Power on to get to the wipe menu? See screenshots, there are a lot of errors. Can I ignore them? After I have done the wipe and do a reboot, I see my old system with all the installed apps.

    $wipe1.jpg

    $wipe2.jpg

    $wipe3.jpg

    $wipe4.jpg
     
    Last edited: Jan 16, 2013
  4. FloRider

    FloRider Senior Member

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    Hmm... I hate to say this, but first flash the .9d cwm just to be sure. Then, enter recovery -- yes, use power + vol up. Then format the devlog (I think that's the name). Then do a factory reset. After that, install 4.0.4. Then go back to fastboot to flash the .9c cwm. Formatting the devlog should get rid of some of those errors, but others look more serious. This is my best suggestion at this point, and it should be a relatively quick process.

    Sent from my IdeaTabA2109A using Tapatalk HD
     
  5. a2109a

    a2109a Member

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  6. mcl630

    mcl630 Senior Member

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    Add step 2a) Install the ICS bootloader.
     
  7. FloRider

    FloRider Senior Member

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    Oops. I'm sure it's in a post, but how do you change the bootloader?

    Sent from my IdeaTabA2109A using Tapatalk HD
     
  8. a2109a

    a2109a Member

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  9. Ravak

    Ravak Member

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    Either:
    1. Reboot to Clockwork "d", install ICS Bootloader (once you reboot, Clockwork will no longer work, and neither will your JB ROM)
    2. Reboot to Fastboot, install Clockwork "c" (now Clockwork will be working)
    3. Reboot to Clockwork "c", install ICS ROM

    Or:
    1. Reboot to Clockwork "d", install ICS ROM and ICS Bootloader (once you reboot, Clockwork will no longer work)
    2. Reboot to Fastboot, install Clockwork "c"
     
  10. vampirefo.

    vampirefo. Senior Member Developer

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    I run the JB cw_recovery on both ICS and JB bootloaders without issue. So there may not be a need for the ICS cw recovery any more.
     
    Last edited: Jan 20, 2013
  11. a2109a

    a2109a Member

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    Where do I get ICS bootloader? Is this a file?

    Edit: I found:

    A2109A_ICSBootloader.zip
    MD5: 15b243e9e2bad8236bbaf06c05a17351

    Is this the right one?
     
    Last edited: Feb 23, 2013
  12. a2109a

    a2109a Member

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    Edit:

    ATTENTION: A while afterwards USB-debugging / development options could not be activated anymore, which is very critical, since you need it to flash the device.

    I could flash from MCL ICS to stock ICS by pressing VolumUp + Power (still no usb-debugging)
    Factory reset of ICS from the options menu (still no usb-debugging)

    And then I tried a few times to upgrade to Stock 4.1.1 over the air with the menu. Often I got a network error, but then the Update from Stock 4.0 to 4.1 worked. (still no usb-debugging)
    After a factory reset in the options menu of JB (now) I can activate USB debugging again, but it is unrooted now.

    My tablet behaves very weird. Maybe the internal flash is broken. Somtimes writing of the flash memory doesn't end, eg after a download from the playstore. It stays at 100% for minutes. After a reboot it works without problemls. Unfortunately similar things happen again and again.

    So at the end I landed at Jelly Bean again, but with an unrooted Stock ROM. Let's see how it goes on.


    Original posting:

    Finally I finished the downgrade to 4.0.4

    I followed:

    [​IMG] Originally Posted by Ravak [​IMG]
    Or:
    1. Reboot to Clockwork "d", install ICS ROM and ICS Bootloader (once you reboot, Clockwork will no longer work)
    2. Reboot to Fastboot, install Clockwork "c"


    With my Linux box I did as _root_:

    So I started with cwm for 4.1.1

    I installed
    superuser-3.1.3-arm-signed_md5_b3c89f46f014c9df7d23b94d37386b8a.zip
    a2109a_mcl0103_md5_2735494332747a425e283ed17230bea0.zip
    a2109a_icsbootloader_md5_15b243e9e2bad8236bbaf06c05a17351.zip

    Then I rebooted. I heared the Nvidia-sound and saw these "animated circles" but it never ended.

    So I did again the 2 commands above with my linux box (never disconnected the USB-cable)

    And I installed a2109_cwmrecovery-6.0.1.9c_md5_2a36e65e8e5289c67f59d1570eb9e3e6.img and rebooted.

    The tablet still didn't go on further than "animated circles", same es before.

    Now I did on my linux box:

    So I used the cwm for 4.04 now and wiped all the cache I found and installed

    superuser-3.1.3-arm-signed_md5_b3c89f46f014c9df7d23b94d37386b8a.zip
    a2109a_mcl0103_md5_2735494332747a425e283ed17230bea0.zip
    a2109a_icsbootloader_md5_15b243e9e2bad8236bbaf06c05a17351.zip

    Now the tablet asked me like in a new setup. Maybe I had to wipe at the beginning and this was the reason why it didn't start to the end.
     
    Last edited: Feb 23, 2013

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