Install Ubuntu 12.04 LTS 64bit in Lenovo S205 Failed

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http://askubuntu.com – I had ever installed Ubuntu 12.04 in Lenovo S205 twice, but it could not boot like an ordinary laptop. how i can fix this problem.? i tried to install dual boot. windows and Ubuntu. but it could not work properly. even, when i installed single boot. it could not too. installation was okay, but it could not boot to Ubuntu. just stuck in blank screen. like what I posted in my blog below http://fzakiul.wordpress.com/2012/05/11/lenovo-ideapad-s205-vs-ubuntu/ extremely need a help. (HowTos)