You are trying to install in EFI mode to a disk that is not partitioned
for it, and chose to ignore the warning suggesting a bios mode install.
** Changed in: grub-installer (Ubuntu)
Status: Confirmed => Invalid
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Bug
The same in the release version.
Installer cannot continue.
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https://bugs.launchpad.net/bugs/1562238
Title:
grub-efi-amd64-siged failed to install
To manage notifications about this b
** Changed in: grub-installer (Ubuntu)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1562238
Title:
grub-efi-amd64-siged failed to install
To manage notificatio
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: grub-installer (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1562238
Titl
After reporting, I realized I'd forgotten to mark the partition as
bootable. Doing so did not by itself solve the problem.
Contrary to https://help.ubuntu.com/community/UEFI ("Mount point:
/boot/efi (remark: no need to set this mount point when using the manual
partitioning, the Ubuntu installer w
