No, everything is gated on what archdetect reports, and thus only shows
iff we're running on an EFI system.

That said, I wonder if something might be not properly following the
ignore_uefi debconf template.

When you ran the installer, did you get a message window about other OS
being installed and whether to continue in UEFI mode?

If you tried to start the live CD again on that machine, could you get
us the output of the following commands, before you run the installer at
all?

ls -lR /sys/firmware/efi
archdetect

The output of archdetect should probably read "amd64/efi". If it's the
case, archdetect thinks it's on an EFI system, and following the install
steps should lead to installing shim. Any issues there would have to do
with an incomplete implementation of EFI (and that's why I'd like to
know what is in /sys/firmware/efi)

If it reads "amd64/generic", then we have a bigger problem, where
somehow shim is installed where it really shouldn't be.


** Changed in: shim-signed (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1636148

Title:
  package shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3
  failed to install/upgrade: subprocess installed post-installation
  script returned error exit status 1

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