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

[david6]

Attempting to install Vivid (15.04) Daily Build, on HP Stream 11 (Bay
Trail notebook, with eMMC storage):

- Installed using USB drive, with UEFI-only image; (.ISO file 'restored' to USB drive, no SysLinux or MBR)
- Installer incorrectly concludes that the drive contains "an existing BIOS-mode install", and that Legacy-mode is enabled; (prompts to 'Force UEFI' mode)
- install appears to complete, but will NOT boot. (Even on restart, not recognised as (UEFI) bootable)

I have verified that (a.) the drive is NOT blank, and had contained
14.10 64-bit; and (b.) Secure-Boot mode is enabled (and Legacy
disabled).

CONCLUSION:

This is more like the logic being REVERSED, than the original
description of the issue (in 'Bug Description').

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

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

Status in partman-efi package in Ubuntu:
  Invalid
Status in ubiquity package in Ubuntu:
  Triaged

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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