[Bug 1937115] Re: Unable to install Impish daily in UEFI boot mode

[Chris Guiver]

Lubuntu impish QA-test install to
- sony vaio svp112a1cw (i5-9400u, 4gb, intel haswell-ULT)
testcase:  full disk, uEFI, ...  (fails to boot so doesn't matter)

"INVALID IMAGE"
"FAILED TO BOOT"

then quickly boots to "Attempting to decrypt master key..." of the prior
QA-test install located on ssd

the actual messages are more than I typed; but they only flash before
switching to the ssd boot which boots the prior QA-test install to the
box.

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https://bugs.launchpad.net/bugs/1937115

Title:
  Unable to install Impish daily in UEFI boot mode

Status in syslinux package in Ubuntu:
  Confirmed

Bug description:
  Testing Ubuntu Impish daily ISO= http://cdimage.ubuntu.com/daily-
  live/20210721/impish-desktop-amd64.iso

  The test machines are:
   
  1. Dell [ Optiplex] MT 7040 i7-6700 booting in UEFI mode
  2. Dell [ Optiplex] MT 7060, i7-8700 booting in UEFI+secure boot mode

  Boot from USB media fails with the message:

  Failed to open /EFI/boot/? invalid parameter

  No further info available

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