hello!!

           I had a problem in dual booting of linux and windows xp .I had installed both successfully and also used both of them for about a month .Just 2 days ago during grub's selection in os menu 

when i am selecting linux ubuntu error in (GUI) display occured and only command line interface is provided any one interrested in solving my problem plese help me.

                   I like linux very much ,such a situation arised .so kindly help me