2D Games graphic problem (Linear + XBR = On)

[LunaMoo]

If you didn't tried this yet - restore default settings(there's an option for that in system settings), then make sure rendering resolution is set to x1(defaults for that depend on screen resolution, so you might need to change it;p) and run the game without using savestates ~ just to make double sure your problem isn't caused by some hacks, unsafe settings or memory corruption.

If it still happens ~ it's either some new emulation bug or a problem specific to your device.
In that case - you could search if we have an issue for such problem here and if not, open one yourself(and arm yourself in patience). Just make sure to check what gpu your smartphone has - that would be rather important info and unfortunately "Samsung Galaxy S2" doesn't tell it since this model had few versions with completely different hardware.