Question [Q] [P715] Get Auto Reboot when Screen Turn Off

I just made ​​a kernel for this phone. all went well except the wifi and my phone will reboot when the screen turn off. there is not available logcat for auto reboot bug. I made ​​a kernel without any change, I only use the original config of my phone.
Phone: LG Optimus L7 II Dual P715
ROM: MIUI V5 4.4.25
Recovery: CWM v6.0.3.7