[Bug 1228737] Re: Ubiquity does not recommend to use 64-bit disk when ESP exists

[林博仁(Henry Lin) a.k.a. Ｖ字龍(Vdragon)]

This bug fix will reduce the wasting time trying to install 64bit Ubuntu
in lagecy mode and later found out it is not compatible with the
existing UEFI Windows 8 booting.

Adding the warning is really helpful in this case.

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https://bugs.launchpad.net/bugs/1228737

Title:
  Ubiquity does not recommend to use 64-bit disk when ESP exists

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  if :
  1) there is an ESP on the disk (eg preinstalled Win8), 
  2) and the CPU is 64-bit compatible, 
  3) and if the install disk is 32bit. 

  then currently, the Ubuntu installer will install Ubuntu-32bit in Legacy mode. (reminder: current Ubuntu-32bit cannot boot in UEFI mode)
  However, the computer will very probably be using UEFI boot (at least for all preinstalled Win8 computers). Result: Ubuntu will not boot.

  Fix proposal:
  when detecting the 1-2-3 conditions, the installer (Ubiquity) should strongly recommend the user to use a 64-bit install disk.

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