[Bug 1418706] Re: UEFI: blank drive incorrectly detected as existing BIOS-mode install

[Evan]

Still present in public release of Ubuntu MATE 16.04, and presumably
other Ubuntu versions as well.


What do we need to do to help this get fixed? This is, as Martin says, infuriating. It completely blocks you from installing Ubuntu in Hyper-V to a blank VHDX using EFI boot.

I tried the steps Martin posted, and I was able to get past that screen. Indeed, if you just select "EFI System Partition", it formats it as ext4, with no option available. Yet if you consult here the EFI spec v2.5, section 12.3, it states that "The file system supported by the Extensible Firmware Interface is based on the FAT file system," so ext4 would be inappropriate. Source:
http://www.uefi.org/sites/default/files/resources/UEFI%202_5.pdf#page=536

Unfortunately, I later ran into problems installing GRUB2 and the
process failed, so there is still something else to debug.

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https://bugs.launchpad.net/bugs/1418706

Title:
  UEFI: blank drive incorrectly detected as existing BIOS-mode install

Status in partman-auto package in Ubuntu:
  Confirmed
Status in partman-efi package in Ubuntu:
  Invalid
Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  When doing a UEFI-mode install using the latest daily Vivid ISO (Thu
  Feb 5), Ubiquity incorrectly concludes that a blank drive contains an
  existing BIOS-mode install (see error in attached screenshot).

  The resulting error dialog is also broken: none of the buttons do any
  thing when clicked: X (close button), "Go Back", "Continue".

  You can seemingly move the install forward by clicking "Continue" in
  the main installer window, but things are still broken somewhere as
  grub isn't getting correctly installed (system is unbootable after the
  install completes).

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