Hi,
Just upgraded from Lunar Lobster to Mantic Minotaur and now my dual-boot options don't show on start-up.
I get a blank grey box for a few seconds then Ubuntu loads automatically.
Anyone have any idea how this could be solved before i have to roll-back to Lobster?
I also got a gray box for my GRUB boot menu after upgrading to Mantic Minotaur. Next boot, while the gray box is displaying, hit the right shift key. Your old dual boot menu should be there.
Hope that helps
It looks like step 3 should be 'sudo update-grub' rather than 'sudo grub-update' according to the grub file.
These steps haven't solved the issue for me unfortunately.
As jmarkus pointed out, right shift key does reveal the menu so maybe this is a querky feature rather than a bug.
Thanks thom. When I had the grayed out Grub boot menu - I remembered something about the shift key toggle, but never properly fixed it. All fixed now - thanks to you.
Jim