I was running CM 12.0 for a long time with encryption and no major issues, until recently I upgraded to 12.1, without formatting etc. Then I had this issue.. after the full boot, the phone reboots in a boot-loop at the pattern unlock screen. If I turned it off fully and restart, I would get to the SIM unlock screen, with the unlock dots showing below that, and after inputting the PIN it dissapears to a blank screen, where you can just pull the Dialer out, but with phone still not decrypted.
So I went into TWRP, pulled my data, fully formatted and started clean, installed 12.1 from scratch and used it for some days without any problems... until I turned encryption on, and after ~12 or so minutes (with the Android logo and some text saying it's encrypting etc).. I have exactly the same issue.
What's going on? Can I fix this without having to format all again?
Update: if I remove the SIM card it works, so maybe the issue is not directly related to the encryption.
Update2: the following steps seemed to resolve it, for now.. not sure what will happen on next reboot:
Remove SIM card
Access phone normally
Go to settings, Security, pattern unlock
Remove the lock. Then turn it on again (you'll need to draw the pattern once more)
Turn off.
Insert SIM back
~Working with some minor issues.
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So we are now stuck. When sent a reset to phone, but if it is in the flight mode, not working. The hard reset, and download mode is disabled (i tested)..
Any tips, how to turn solve this situation? Somehow reset the phone..
Thank you for any official/unofficial legal/unlegal tips.