thanks for the help your solution solved my problem and everything is fine with grub now .But i am facing one problem after editing the file as per your instruction the GRUB is fine when i load it through it display the options and then when i select my ubuntu image to boot it goes in to text mode and load all the hardwares after loading all the hardware it enters the GNOME.
-- package linux-image-2.6.31-20-generic 2.6.31-20.58 failed to install/upgrade: exit status 127 - /etc/default/grub: 9: : Permission denied https://bugs.launchpad.net/bugs/540377 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs