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CM 10 won't start after downgrade from 10.1!!!
I rooted my device (Galaxy Nexus GSM / Maguro) weeks ago and switched from the stock OS to Cyanogenmod 10.
Some days ago I received the (so called "stable") update to 10.1 and installed it (gapps 121212 too).
Unfortunately, the stable 10.1 turned out to be rather unstable: Apps (Google Play Music, Skype, Youtube, SMS, ...) either crashed on device startup or as soon as the app was started.
SMS frequently froze the whole phone.
The former rather fast and stable device became an unstable and failure-prone device
Installing diverse nightly builds didn't improve the situation, so I decidet to roll back to 10.0.
Again, a bad decision! After installing it, CM won't boot any more. I can see the boot-image (the circle of death, as I call it by now) and that's it!
I tried to reboot in recovery mode, but I cannot switch options with the volume keys. The only option I have is to boot into the broken system...
Below the android icon it reads:
Do not turn off target!
Nexus Root Toolkit does'nt recognize it (neither as fastboot nor as adb device).
Is there any help?
My computer system ist Windows XP SP 3.
Your help is much appreciated!
BTW: I don't know if this Information is relevant: The Android-Icon in recovery mode is not a lying one with its belly open but the standard 2D-Android-icon...
And, perhaps more grave: Due to security concerns, ADB was disabled in my (then working) Cyanogenmod-OS...