Asus A3500L screen flicker

Hi to all!
I have upgraded Asus A3500L from OpenSuse 11.0 to 11.1 and get some strange issues with X system. Screen is flicker like a low refresh rate and some artifacts are appear while scrolling pages in browser.

xorg-x11-7.4-8.13
videochip: Intel Corporation 82852/82855

Does anyone have thoughts about this problem?