This only effects ubuntu on ubuntu installs I have confirmed that fedora 23 ubuntu 16.04 side by side works as expected.
I believe the cause is that all ubuntu installs share a common path to file ie /boot/EFI/ubuntu/shim..... where as Fedora is at /boot/EFI/fedora/shim...... ** Changed in: grub2 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1560973 Title: EFI booting Ubuntu image to grub removes existing boot entries and makes system unbootable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1560973/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs