Xperia Pro/Neo/V/L :: Lag During Unlock And Automated Tasks Definition

I am facing the issue regarding a lag with when trying to unlock with the slider button and with the unlock pattern, and when trying to answer calls sliding the button.But, for example, if I am doing something on the phone and somebody calls me, the slide answer button works without a problem, as well as the pattern definition in the security settings. So, since this only appends when the phone is in sleep mode, more than with the tasks themselves, I guess this lag might be related with the internal process to turn it back on. It seems that it takes something like 4 to 5 seconds to start to work properly. One other thing, after the restore of the OS, during the initial configuration, when I first connected the audio jack, inadvertently I have defined an incorrect task (opening a web page).