[Bug 1939174] Re: GRUB2 can't boot Linux on HP Dragonfly G2

[Nicholas Stommel]

*** This bug is a duplicate of bug 1939988 ***
    https://bugs.launchpad.net/bugs/1939988

Okay wait a minute, it IS possible to install Ubuntu by writing the ISO
to the bootable key with dd from a machine running Linux. I used dd like
so: `sudo dd bs=4M if=/home/noctua/Downloads/ubuntu-21.10-desktop-
amd64.iso of=/dev/sdb conv=fdatasync status=progress` and I was amazed
that Ubuntu actually booted. It took some time to boot, but I was able
to use the installer successfully and I can confirm Ubuntu 21.10 works
fine on the Elite Dragonfly G2 (disable PSR using i915.enable_psr=0 in
the GRUB config kernel boot parameters after installation to eliminate
screen tear and lag). Definitely try doing that. It seems like the HP
system firmware has a flaw with being unable to boot certain things.
Given that the Fedora USB creator writes the raw ISO to the key, this
might be why a Fedora USB key works. I still think this is a flaw that
needs to be fixed, but at least there is a workaround.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2-unsigned in Ubuntu.
https://bugs.launchpad.net/bugs/1939174

Title:
  GRUB2 can't boot Linux on HP Dragonfly G2

Status in grub2-unsigned package in Ubuntu:
  Confirmed

Bug description:
  Hello!

  On HP Dragonfly G2 GRUB2 can not boot Linux. This issue is not
  reproducible with rEFInd or Fedora's GRUB2 (that launch vmlinuz as efi
  executable) but reproducible with Ubuntu 20.04.1, 21.04 and 21.10.

  After selection kernel in GRUB2 list there is just black screen, also
  reading from flash stop right there (judging by led on flash drive).
  Removing quiet splash, adding loglevel=10 and/or earlycon=efifb
  doesn't change anything, so it's really seems like kernel can not even
  start boot process.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: grub-efi-amd64-bin 2.04-1ubuntu45
  Uname: Linux 5.13.8-051308-generic x86_64
  ApportVersion: 2.20.11-0ubuntu67
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: GNOME
  Date: Sat Aug  7 04:18:17 2021
  InstallationDate: Installed on 2021-07-11 (25 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  SourcePackage: grub2-unsigned
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/1939174/+subscriptions