Droid 4 freezing when rotating screen

[tompase]

Since three-four days my Droid 4 is getting me mad freezing without a reason.
I've tried to check when this happens and I'm pretty sure that if I rotate the screen in landscape mode (even if I disable auto-rotate but I open the keyboard) and then I go back to portrait mode the phone freezes (black screen, but I can be sure that the phone is switched on because the lower buttons -menù, home, return and search- are switched on and the tactile feedback works) and I've to make a soft reset to make it work again. Moreover, even if I let it in portrait mode sometimes it freezes.
Anybody is having the same problem? How can I solve it? (if possible avoiding a factory-reset)
[My phone is a Droid 4 with Android 4.1.2, version 98.72.18.XT894.Verizon.en.US]

 

[tompase]

Ok, just done a factory-reset, the problem isn't solved. When I switch to portrait mode (vertical) the screen goes black (but the buttons are still working) and I must reboot the phone to solve the problem. Any suggestion?

 

[bweN diorD]

i would either try this utility [SCRIPT] DROID 4 Utility XT894 Jellybean -- Windows + Mac + Linux (All In One!) - xda-developers to re-flash the stock software,
or return it for a warranty replacement if its still under warranty.