There was an incorrect package version: grub-common:i386 installed somehow. No idea where that has come from. I removed that and installed the correct grub-common amd64 -version. After running boot-repair again, Ubuntu now loads via Grub with SecureBoot enabled, but Windows 10 has to be loaded through UEFI Bios alternative boot options (Grub does not load Win 10 at all any more).
So I guess shim works now, the wrong grub-common package interfered with it somehow. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1508414 Title: When Secure boot is enabled, grub won't load (there is an error message about security in red) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1508414/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
