Hi guys, i have a Lumia 920 which had the same problem, for me it 2 things seemed to help, turning off Glance screen and Wifi while charging, as the lockup happened only during charging, see thread
8.1 DP and Glance Screen( can't post links )
Now i have 2 questions:
1. Did any of you with this problem reflsh the handset to another ROM, and now isn't on stock rom.
2. Does it help turning off Wifi and glance( if enabled) at least during the charging period ?
As i wrote in my thread, i've been talking over email with MS representative from support team about this problem, sent them logs, explained the circumstances of this happening and on 25 of August they mailed me with the following:
Hello Victor,
Thank you for your feedback. The issue you are experienced should have been solved by an update. Please update your phone and see if this is happening again.
Let me know how it is going,
Kind regards,
.
As i was on dev. preview i couldn't get Cyan at that moment so i reflashed the handset with the latest available build, which included and Cyan, then upgraded to the Update 1 ( dev preview ), so far my handset isn't locking anymore, and i put it to charge with all ON ( testing purposes ) .