It is supposed to leave the older kernels there. IMHO this is a safety feature. You should have 2 kernels in grub to boot to at this time. I am closing this as it is not a bug but a feature. Thank you.
also if you want to remove the old kernel open synaptic/adept and find the kernel and click completely remove than sudo update-grub. I strongly suggest leaving atleast 2 kernel entries in grub just incase one is not able to boot. -- grub left old kernel boot option after upgrade https://launchpad.net/bugs/55956 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
