Same here! Very annoying even when the screen turns on eventually it is always on min. brightness and then slowly brightens up
Tried Hard reset - no go!
The brightness thing is what really annoys me. When you turn the screen on, it's always at minimum and you have to wait a second before it brightens up!
Have a similar problem with my SGS3 and drives me crazy.
Does this also happen when using double tap and the hardware power button too?