[HOW TO] install Jelly Bean OTA an a GEDified Xoom

[dizzy33]

Hello,

owning a Gedified french Xoom with stock ICS, I thought the official Jelly Bean OTA upgrade would be easy ... But it was not !
That's why I thought it would be good to make a little tutorial on how to do it.

There are 2 conditions for the OTA upgrade to work :
1) The recovery installed on your Xoom should be the STOCK ICS 4.04 one.
2) The bootloader must be LOCKED.

In my case, when I GEDified my Xoom, I left the bootloader unlocked after having flashed the Honeycomb U.S. image. There was no problem at this time, I could then easily upgrade upto ICS 4.04 with my bootloader unlocked. But when I tried to update with Jelly Bean, after the Xoom rebooted it was stuck with an image of the Android robot laying down ... It was impossible to do the upgrade. So I flashed the stock 4.04 Recovery, the installation of Jelly Bean could then go a little more further, but crashed again.
So I tried to re-lock the bootloader, but when done, when the Xoom rebooted it was stuck on an error message :
"failed image lnx 0x0002"

So in the case where your GEDified Xoom has still its bootloader unlocked, as you cannot re-lock it when running ICS, you only have one solution which will let you loose all your Xoom datas :
you need to unlock the bootloader, then re-flash the stock U.S. Honeycomb, then relock the bootloader, then re-apply all the Android updates upto Jelly Bean. At the end, your Xoom will be locked, unrooted, but running the stock Jelly Bean.

Here is how to do this :

Put all the HWI69 files into the same directory as the adb commands (I assume that you already know how to flash a ROM into the Xoom and you know where to download the ROM as your Xoom should have been already GEDified in the past), then open a dos commands window and do the following commands :

adb reboot bootloader (wait for the bootloader screen to be displayed).
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
fastboot oem lock

So as said earlier, then your Xoom will be running the stock Honeycomb but with a locked bootloader this time, which will then let you to update your Xoom upto Jelly Bean.

I hope this little Tutorial will help you.
So it means that if you have rooted your Xoom, you cannot update to Jelly Bean without reverting to stock Honeycomb and therefore loose your data ...
Now I will have to manually reinstall each software, one by one, from the market as no backup software works without root permission ...
If I knew that before installing ICS, I would think twice before rooting it !

Thanks

 

[noTHINGface]

Thanks for this. I was in the same boat, ie UK GEDified Xoom with an unlocked bootloader...

 

[Mark-IE]

As dizzy33 has said in the bottom of his post this seems to appear if you rooted your Xoom. If you only unlocked the boot loader to flash the US ROM to make you Xoom a GED and did not do the step to root it the OTA update will work successfully and your data won't be wiped.

 

[dizzy33]

As dizzy33 has said in the bottom of his post this seems to appear if you rooted your Xoom. If you only unlocked the boot loader to flash the US ROM to make you Xoom a GED and did not do the step to root it the OTA update will work successfully and your data won't be wiped.

No, what you say is only partially true : on a GEDified Xoom you need to have a locked bootloader, otherwise the OTA will not work.
The problem of rooting a Xoom is that you need to unlock the bootloader, and you cannot re-lock a bootloader if your Xoom is running ICS.
That's why you need to go back to Honeycomb to re-lock the bootloader, and then proceed with all the upgrades upto Jelly Bean.

 

[gmanunited]

But there is still the root issue. You cannot gain root access.

 

[Mark-IE]

No, what you say is only partially true : on a GEDified Xoom you need to have a locked bootloader, otherwise the OTA will not work.
The problem of rooting a Xoom is that you need to unlock the bootloader, and you cannot re-lock a bootloader if your Xoom is running ICS.
That's why you need to go back to Honeycomb to re-lock the bootloader, and then proceed with all the upgrades upto Jelly Bean.

My boot loader was unlocked and the OTA worked fine so something else must have caused your problem.

 

[noTHINGface]

My boot loader was unlocked and the OTA worked fine so something else must have caused your problem.

Mine was unlocked and I did have the issue Rolled back to honeycomb, locked the bootloader and im now all JB'ed up. Odd.

 

[fham]

I, too, have been going through this crapola with my Xoom WiFi. The culprit is the locked bootloader the HC laden Xoom shipped with (as are some of the HTC devices, which are also a PiTHB because of bootloader issues).

The only issue, albeit not a major one, is that the JB update after the OTA is not rooted. I suppose it is a matter of time before we get a JB custom ROM with root.

I had grown to like my ICS rooted, unlocked Xoom. Now the annoying JB OTA notice will not go away until I go back to HC.

---------- Post added at 09:20 PM ---------- Previous post was at 08:57 PM ----------

Forgot to mention that I have had no luck (YET) flashing stachre's Stock rooted JB build http://forum.xda-developers.com/showthread.php?t=1796335

 

[barkinglama]

Hello,

owning a Gedified french Xoom with stock ICS, I thought the official Jelly Bean OTA upgrade would be easy ... But it was not !
That's why I thought it would be good to make a little tutorial on how to do it.

There are 2 conditions for the OTA upgrade to work :
1) The recovery installed on your Xoom should be the STOCK ICS 4.04 one.
2) The bootloader must be LOCKED.

In my case, when I GEDified my Xoom, I left the bootloader unlocked after having flashed the Honeycomb U.S. image. There was no problem at this time, I could then easily upgrade upto ICS 4.04 with my bootloader unlocked. But when I tried to update with Jelly Bean, after the Xoom rebooted it was stuck with an image of the Android robot laying down ... It was impossible to do the upgrade. So I flashed the stock 4.04 Recovery, the installation of Jelly Bean could then go a little more further, but crashed again.
So I tried to re-lock the bootloader, but when done, when the Xoom rebooted it was stuck on an error message :
"failed image lnx 0x0002"

So in the case where your GEDified Xoom has still its bootloader unlocked, as you cannot re-lock it when running ICS, you only have one solution which will let you loose all your Xoom datas :
you need to unlock the bootloader, then re-flash the stock U.S. Honeycomb, then relock the bootloader, then re-apply all the Android updates upto Jelly Bean. At the end, your Xoom will be locked, unrooted, but running the stock Jelly Bean.

Here is how to do this :

Put all the HWI69 files into the same directory as the adb commands (I assume that you already know how to flash a ROM into the Xoom and you know where to download the ROM as your Xoom should have been already GEDified in the past), then open a dos commands window and do the following commands :

adb reboot bootloader (wait for the bootloader screen to be displayed).
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
fastboot oem lock

So as said earlier, then your Xoom will be running the stock Honeycomb but with a locked bootloader this time, which will then let you to update your Xoom upto Jelly Bean.

I hope this little Tutorial will help you.
So it means that if you have rooted your Xoom, you cannot update to Jelly Bean without reverting to stock Honeycomb and therefore loose your data ...
Now I will have to manually reinstall each software, one by one, from the market as no backup software works without root permission ...
If I knew that before installing ICS, I would think twice before rooting it !

Thanks

Hi

I wonder if you could help

I have a stock UK Xoom on ICS

I have been trying to get it to jellybean using this method

I have used these commands successfully

adb reboot bootloader
fastboot oem unlock

it's at

fastboot flash boot boot.img

I get stuck

The xoom is in debug mode and when I run this command all I get is "waiting for device"

What am I doing wrong

Thanks