yes trusty-proposed is enabled. I've disabled _proposed option, then installed grub-efi-amd64-signed package and it works fine now; I am able to boot in secure mode.
Thx a lot for your great help and this good investigation. Kind regards Vincent. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1455754 Title: Wrong signature on EFI Bios after dist-upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1455754/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
