Problem with locking the screen

[Guest Chloru]

Hello,

I'm new here. I use my B-7300 for about 2 months and its quite cool device with great bang for buck factor.

I do have one irritating problem. When I push "lock screen button" the screen won't go black. Instead it switches to locked screen (doesn't matter if I use S2U or default screen lock software) and stay like this. This causes higher battery usage because screen light is switched on for the whole time. Sometimes it goes black and locked screen back and forth. I've tried to change screen lock settings, different S2U configuration etc. What I've noticed that sometimes after connecting it to the computer or charger it goes back to normal behavior. For some period of time I can turn off the screen with the button in the upper right side.

Any hint or solution will be more than appreciated.

Thanks in advance !