Screen goes to sleep while playing (SGS2 2.7.20)

Dec 26, 2011
Hi there,
As stated in the subject, the screen turns off while I'm actually using the phone without touching the screen (I noticed it in a "tilting device")
Really annoying, because the game freezes afterwards.
Any idea, a part of setting sleep timer to higher values?

Sent from my GT-I9100 using Tapatalk 2