dimanche 9 août 2015

Phone bootlooping if i update to CM12, working with CM11S and ColorOS



Hi everyone, i've got my OPO when CM12 still wasn't a thing, and it always did his job wonderfully, i've updated to CM12 when it first came out, then updated it every time a new stable version was out, YNG1TAS2I3 version included (with root access and TWRP). A few days ago, while i was listening to some music with Google Play Music, the phone started to reboot itself for no apparent reason, and after around 10 reboots with random timings, i found out there was a problem with google play services, so i blocked them with Titanium Backup, deleted updates, updated them again, reactivated, and everything went fine.

Yesterday, my phone once again rebooted by itself, but every time it was rebooting, while showing the boot logo, it rebooted again without actually loading android. I first tried to wipe cache, then dalvik cache, then data and system partitions, factory reset, but it kept rebooting no matter what, until i tried to flash CM11S on it. After a few tries and total wipes, CM11S was running with no reboots, and it worked flawlessly, no root, no custom recovery, everything stock flashed from official fastboot images zip.

After that, i tried to update via OTA to the more recent versions of CM11S, no problems so far, but as soon as i updated to CM12 via OTA once again, the phone started to reboot itself after the update, it says "Upgrading Android" like when you wipe the dalvik-cache, and then it freezes for a second, then reboots.

Things i've tried so far:
  • full wipe and factory reset from TWRP

  • erase and flash again all partitions

  • erase and flash again persist partition

  • flash colorOS and then flash CM12


After flashing the persist partition it managed to work for a minute on CM12, but then it started rebooting itself again, and i've managed to save the last part of logat log , but i'm not sure if it's worth anything to find out the problem! (i can't post it on forum because of the new user link restriction, but if you want to have a look at it, let me know)

So, basically, my phone works only on android 4.x and not on 5.x, I would think some app on it can make it crash, but even after a full wipe it still behaves like this, what could be the reason and how can i try to fix it? thanks in advice!



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