I changed my LG L70 operating system from dalvik to art, why has my Keyguardtestactivity stopped since?

[AC Question]

i changed my lg l70 operating system from dalvik to art

since then whenever i on it it will say my keyguardtestactivity has stopped, pls tell what to do

 

[beagle82]

Re: i changed my lg l70 operating system from dalvik to art

Switch back to dalvik. Not all apps were compatible with ART. I had similar issues on a previous phone. ART was still experimental on kit kat.