Resolution resets after every reboot and Screen Resoultion stuck at 1024x768

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http://askubuntu.com – okay i installed a fresh copy of ubuntu 12.10 but the problem is that it doesnt recognize my monitor which is LG E1942.... also the screen resolution is stuck at 1024x768 and the other option is 800x600 but my monitor has optimum resolution of 1366x768..... my system config is Intel i7-2600k Intel Z68DB motherboard 8GB RAM Intel HD2000 Graphics(No graphics card....) have tried using cvt and xrandr but it changes to deafult 1024x768 after every reboot.... also i am not able to find the xorg.conf file...... PLZ HELP as i am a comple NOOB in UBUNTU (HowTos)