[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 32GB eMMC storage). Device already has 14.10 64-bit
present (standard auto-install: EFI, system, swap), and Secure-Boot mode
is enabled.

http://cdimage.ubuntu.com/ubuntu/daily-live/pending/
  vivid-desktop-amd64.iso  17-Apr-2015  08:38

- Installed using 4GB USB drive, with UEFI-only image; (.ISO file 'restored' to USB drive, no SysLinux or MBR)
- Installer incorrectly prompts with warning that the install target contains "an existing BIOS-mode install", and that Legacy-mode is enabled; (prompts with option to continue in 'UEFI' mode)
- install appears to complete, and prompts for reboot; (identical behaviour as 14.10 install)
- reboot stops, device still power-on but screen blank (no backlight); (often occurs with 14.10 install, on HP Stream 11)
- force off, wait 5, power on. (boots normally)

However. now prompts with:
"Please enter passphrase for disk cryptswap1 on none!"  (new behaviour !?)

Pressing <Enter> <Enter> gets through to normal login ..

CONCLUSION:

-  primary issue may now be 'fixed';
- the 'force-UEFI' dialog/prompt is still an issue; (separate bug?)
- prompt for passphrase is well .. ODD.

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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-auto package in Ubuntu:
  In Progress
Status in partman-efi package in Ubuntu:
  Invalid
Status in ubiquity package in Ubuntu:
  In Progress

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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