Comment 10 for bug 1642298

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dann frazier (dannf) wrote : Re: UEFI Xenial install sets computer to boot from hard disk

@Larry: Are you able to provide a console log using Ryan's debug curtin package?

I wonder if GRUB is getting upgraded post-install, thus causing a second grub-install command to run in the postinst. This is a known issue w/ MAAS on EFI systems - though it usually only bites when you upgrade GRUB after deploy. I haven't seen it occur *during* deploy. If this is the case, a patch like the following would allow curtin to preseed GRUB to not make changes to the EFI boot manager during upgrades.