I'm on 15.04 and latest upgrade shows grub-efi-amd64-signed as "to be removed" (along with upgrading grub-common, grub-efi-amd64, grub-efi-amd64-bin and grub2-common)
I'm using EFI secure boot, so I think removing grub-efi-amd64-signed might brake my system.
Does anyone have an advice on that ?
I did the update yesterday on 14.04, and 15.04, and it went OK. What I think it does, it removes an older version, and installs a newer one. Both systems have been rebooted, and they both work fine.
This is a a kown issue: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1469995
Afaik it seems related to a dependency problem as updating "grub-efi-amd64" package suggest to remove "grub-efi-amd64-signed" as the last one depends on previous version of the first one.
You should not update now and wait one or two weeks and see if the issue is fixed.
