[Bug 2031267] [NEW] Ubuntu MATE 22.04.3 installer chooses the wrong EFI system partition

[Aki Ketolainen]

Public bug reported:

When installing Ubuntu MATE 22.04.3 to a USB stick in UEFI mode, the
installer chooses the EFI system partition from my internal SSD, instead
of from the USB stick.

The installed UEFI files end up on my internal SSD's EFI system
partition.

I'll include my notes and the after-the-install /var/log directory into
this bug report.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2031267

Title:
  Ubuntu MATE 22.04.3 installer chooses the wrong EFI system partition

Status in ubiquity package in Ubuntu:
  New

Bug description:
  When installing Ubuntu MATE 22.04.3 to a USB stick in UEFI mode, the
  installer chooses the EFI system partition from my internal SSD,
  instead of from the USB stick.

  The installed UEFI files end up on my internal SSD's EFI system
  partition.

  I'll include my notes and the after-the-install /var/log directory
  into this bug report.

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