> > Which chipset are you using ? Could you post your Xorg.0.log ? > > Thanks > Haihao > Chipset is Intel H77, on this mainboard: http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=588 CPU is an Ivy Bridge i3-3220 @3.3GHz, with a HD2500 GPU. Xorg.0.log is at http://bpaste.net/show/73808/