[Bug 1922342] Re: HIrsute live session does not work on BIOS systems

[José Marinho]

Hi.

The software versions I have installed are:

cat /etc/os-release 
NAME="Ubuntu"
VERSION="20.04.2 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.2 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

apt policy gnome-disk-utility
gnome-disk-utility:
  Instalado: 3.36.1-1ubuntu1
  Candidato: 3.36.1-1ubuntu1
  Táboa de versións:
 *** 3.36.1-1ubuntu1 500
        500 http://es.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

 apt policy usb-creator-gtk
usb-creator-gtk:
  Instalado: 0.3.7
  Candidato: 0.3.7
  Táboa de versións:
 *** 0.3.7 500
        500 http://es.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

Furthermore, it can be related to the tool I use for write the ISO to usb, or perhaps like you say, to a quirk on my hardware. But in many years I was using ubuntu and others linux distributions I never or exceptionally had this kind of issues. 
The fact is that some changes was introduced in the way that ISO images are created because if I use an Ubuntu 20.04 ISO and write it to a usb drive it defaults to a mbr partition table and now it defaults (using the same tool and doing it in the same manner) to a gpt partition table and that causes the issue on my hardware.
I just want to let you know. It is on your decision if this is right for you and the distribution or not. You (the whole Ubuntu staff not only you personally) are the developer and know better than me if the pros of doing in that way worth it or not against the contras (It have issues on some hardware). I only put this information at your disposal. 
I, at least, have a workaround and can make use of it.
Any other information that could be useful for debugging this issue, I send without any problem.

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https://bugs.launchpad.net/bugs/1922342

Title:
  HIrsute live session does not work on BIOS systems

Status in casper package in Ubuntu:
  New

Bug description:
  I think the problem is the same as described here:
  https://discourse.ubuntubudgie.org/t/20-10-grub-error-can-t-find-
  command-grub-platform/4292. I can see prior to grub menu, briefly, the
  same error: Error can't find grub_platform. After the solution
  described below, this error is not showed and the system is able to
  boot.

  I try making the live usb using startup disk creator and with gnome-
  disks --> Restore disk image and get the same results.

  The live-usb has a gpt partition table instead of mbr like 20.04 live-
  usb has. That implies, I think, that the first one does not boot on
  BIOS systems and the second does.

  I try the same live-usb on an EFI laptop and it boots perfectly
  (perhaps it takes long time).

  If I try the solution described here:
  https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1905491/comments/8
  then it works.

  I think it is the same bug but I reported it again because, I don't
  know exactly why, it was tagged as invalid, but I think it is a bug
  and it must be solved because it's not normal that users with BIOS
  pc's have to do all this procedure to get a live session working.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: casper 1.461
  ProcVersionSignature: Ubuntu 5.11.0-13.14-generic 5.11.7
  Uname: Linux 5.11.0-13-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu61
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.461
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr  2 09:55:24 2021
  LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Beta amd64 (20210331.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=gl_ES.UTF-8
   SHELL=/bin/bash
  SourcePackage: casper
  UpgradeStatus: No upgrade log present (probably fresh install)

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