automatic display issue. somtime it cannot work

[Android Question]

i have samsung galaxy s2 it creates problem sometime the automatic display off cant work properly and with lock key it can be locked what should i do

 

[Unforgiven]

It sounds like you are having problems with your S2 when the screen turns off and it not locking? I think. Sometimes there is a second or two grace period between the screen turning off and the phone locking up. If I'm misreading your questions, please post back.

 

[divinebovine]

Sounds to me like a wakelock issue. This app says it can tell you which app is causing the wakelock.
https://play.google.com/store/apps/details?id=com.uzumapps.wakelockdetector