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LukasMersch-9881 asked XiaoweiHe-MSFT edited

Hyper-V update grub-efi-amd64 error: /var/lib/grub/esp

I have an Ubuntu 20.04.2 running as a Generation 2 (UEFI) VM on a Hyper-V.
Today I wanted to do an apt upgrade with grub-efi-amd64 (2.04-1ubuntu26.9) previously grub-efi-amd64 (2.04-1ubuntu26.7)
The update process stops at

 Installing grub to /var/lib/grub/esp.
 Installing for x86_64-efi platform.
 grub-install: error: /var/lib/grub/esp doesn't look like an EFI partition.

This error only occurs if the VM has more than one virtual hard disk.
What can I do so that /var/lib/grub/esp is not used but only /boot/efi?

I have only one boot partition!

The problem can be reproduced with sudo apt --reinstall install grub-efi-amd64
With one virtual hard disk it is all ok:

 Installing grub to /boot/efi.
 Installing for x86_64-efi platform.
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I found that you posted this issue on the following forum and seems get a reply there, does the reply in the other forum could be of help to you:

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Best Regards,

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