[Q] Device freezes and reboots frequently after each battery change

Hi,

since a couple of days the phone freezes and reboots frequently after each battery change until network time sync is completed... In detail:

- After reinserting the battery and restarting the device it boots normally, I can enter the code to unlock the SIM and the touch screen is usable
- After a few seconds or so, the touch screen freezes, and does not respond to any action. The home and back buttons respond though.
- Then after a minute or so, the device restarts but does not ask for a new code. Is usable for a few seconds and freezes again.
- This cycle continues until the device has sync'd the time. After that it runs stable.

The device is rooted but runs the stock rom (4.1.2). I wouldn't be surprised it some app causes the trouble, but how can I detect this? Played with logcat already but there's not enough time to start the log recorder after a restart before the system freezes the first time.

Thanks in advance for any help and hint!
Andreas