Heyyy.. m sure.. it just a defection of an application.. like I have installed "Chainfire 3D" on my rooted galaxy Y and then my screen becomes all rough n dat was super annoying!!!
U need a firmware reset. but backup all ur important data first..
so lets get started.. Switch off ur phone> Boot into Recovery Mode [press volume up+down+home buttons all together]> Now touch is disabled here. use volume up/down keys for scrolling & home button to select> select "Wipe data/reset"> select "Yes-Delete all users"> wait few seconds> select "Wipe Cache"> select "Yes-Wipe Cache".. >wait> select "reboot system now"..
Now phone will restart..
First boot may take upto 10 minutes so b patient..
PROBLEM SOLVED!!
if it if not works then goto dialler and dial *2767*3855# to reset ur whole android system n firmware!!
)
for any help u can sms me or call me on +918418063050 !!