I have ubuntu 11.10.
In my grub menu, I have following images:
My linux 3.* image is broken (if I try to boot from first image, i.e. linux 3.*, I get my caps and scroll lights blinking, and nothing appears on my screen).
If I boot from my second image, everything works just fine. My update manager shows everything updated. My software sources are updated. How do I fix my grub loader.
It sounds as if grub is working just fine (you can boot an older kernel) but that you are having a problem with the new kernel (rather then grub).
For this I would file a bug report against the new kernel, but you will need to provide the error message you are getting.
The problem can be in one of two places, the loader or the Linux kernel. Although, it’s seems to be more likely to be a kernel problem, I seem to have solved the problem with the following:
sudo update grub
Or else, something to the order of the following (taken from Can no longer boot with rEFIt and Grub on early 2006 MacBook Pro) might help:
/usr/sbin/grub-install --force /dev/sda3
And there’s always the grub manual.