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Just in case someone has the same trouble I had to flash my tablet, here is how I managed.
My initial wish was to try to get Angry Birds working again because the kids and the wife were frustrated.
So, I decided to try to update to ICS my original 9G2.
My first try was to use Rockchip_Batch_Tool_v1.5 to flash the kasty-arn9g2-40-04 image.
It was not successful, the tablet was detected as R29 device while in "upgrade" mode but not detected by Rockchip_Batch_Tool_v1.5 (tried few hours different tricks without any success).
So, I tried RKDeviceManage_v1.3 and it was OK. At least, the tablet was detected and I was able to flash the image.
But... even if the flashing (almost 50 minutes...) was apparently successful the tablet was not booting corectly and stayed more than 15 minutes on the "Arnova" logo at powerup.
Then I tried again Rockchip_Batch_Tool_v1.5, and this time (most probably thanks to the flashing) it was detected ! I have then re-flashed using "upgrade" button, and it worked. Well... at least I was able to flash without any errors (much more quickyl, by the way, something like 6 or 7 minutes).
But... the tablet was not booting.
I tried again Rockchip_Batch_Tool_v1.5, but using "restore" button. And after 6 minutes of flashing/checking the tablet has fully booted !
So I managed to get ICS.
Few minutes later I tried to get Angry Birds working again, but without any luck. So rigth now I have a fresh ICS flash but still no angry birds.
So I am quite happy to have succeeded in flashing, but disapointed (so the kids and the wife) that Angry birds is still not starting (black screen for 1 or 2 seconds, then back to "desktop").
Here stops my small contribution.
Always use the restore and not the upgrade option
The upgrade option should be used only when you upgrade you use the same firmare that has lets say, some bugs repaired.
For example you upgrade from android 2.3 and choose the ICS firmware, which has a different partition layout and structure of the files, using upgrade you will override the current files that have the same names, but the ones that have a diiferent one will still stay and cause boot conflicts, that`s way the tablet will be in a boot looop.
I recommend always to use RESTORE and not upgrade.
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