Why i cant unlock my screen by lock screen button?

[WPCentral Question]

After i install window 10 technical preview on my lumia 1520, i cant unlock my screen using the unlock button, after i had lock my screen. Got any solution to solve it?

 

[Jonnie LasVegas]

Soft reset it and uninstall any lockscreen apps you might have (particularly Live Lockscreen). Restart it and you should be good.

 

[Chin Linn Kern]

what do u mean soft reset ? One more thing is the setting-> personalization->lock screen. i cant change the choose your background setting n the choose an apss to show detail status. it always crash n show white screen then jump to the home page

 

[Jonnie LasVegas]

Soft reset is to hold volume down
and the power button simultaneously for about 10-12 seconds and it will reboot.
Background image can still be shaky since it is an early build of Windows 10. I haven't personally tried giving an app detailed status on Windows 10 yet. Probably an early bug you can report through the feedback app.