Hi, So for secureboot it's off, the system doesn't boot with it on (compatible key not included with 2012R2's Hyper-V i suppose.
The shim used was the one setup from 20.04.2 install image, technically it's not the same as the one in the "shim" package: 78415fb8fb9b909f8029858113f1335f /boot/efi/EFI/ubuntu/shimx64.efi 9bdc83ad343e8745e1f3d55c36cf2df6 /usr/lib/shim/shimx64.efi But some build information extracted from the binary seem to say otherwise : $Version: 15 $ $BuildMachine: Linux x86_64 x86_64 x86_64 GNU/Linux $ $Commit: a4a1fbe728c9545fc5647129df0cf1593b953bec $ $Version: 15 $ $BuildMachine: Linux x86_64 x86_64 x86_64 GNU/Linux $ $Commit: a4a1fbe728c9545fc5647129df0cf1593b953bec $ I have attached a still frame captured from grub boot with "set debug=all". It's the frame just before the VM reboot. As for the linux-azure kernel, i see no differences on the boot process in any of the three following kernels: vmlinuz-5.8.0-44-generic vmlinuz-5.4.0-1041-azure vmlinuz-5.4.0-67-generic It may be interesting to know however that when the linux- azure-5.4.0.1041.21 kernel was introduced into Ubuntu 18.04 i started to experience weird boot issues causing me to un-install it and fall back to the 5.0.0-1036-azure kernel. There might be some commun issue here ** Attachment added: "2021-03-18 23-26-47.00_00_09_21.Still001.png" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1918265/+attachment/5478015/+files/2021-03-18%2023-26-47.00_00_09_21.Still001.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1918265 Title: Random boot failure with Ubuntu 20.04 / grub 2.04 and Hyper-V 2012r2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1918265/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
