This just happened today. When trying to unlock the phone, the unlock screen becomes unresponsive, however when I hold the power button I am able to press the restart and shut down buttons so the touch screen is fine. Also when I do a clean install the lock screen still doesn't function, but I'm able to activate my phone without any issues using the touch screen. This has absolutely baffled me, hopefully you guys know something to fix it. I'm using Ultimate Droid V10 Update with low voltage 1000ghz kernel.