[ubuntu] Ubuntu not shown for selection while booting.

Hi All,

I am new to ubuntu , i installed ubuntu from usb drive. when i restart my laptop ,there is no menu for OS selection. as per the information available in website i used Boot Repair tool but still i am not getting OS menu option.

Below is the log file from Boot Repair tool.
http://paste.ubuntu.com/5946495/

Any help is appreciaed.


Prabhakaran