[Bug 1922342] Re: Impish live session takes ages to boot on BIOS systems

[Thomas Schmitt]

Hi,

following sudodus' advice i found
  https://discourse.ubuntu.com/t/install-ubuntu-desktop/25312
matching
  https://ubuntu.com/tutorials/install-ubuntu-desktop#4-boot-from-usb-flash-drive
but the "Sign Up" button first urges me to enable JavaScript (booh !)
and then says my browser is too old for its "rich content".
I could probably work around, but this is a demand which i only accept
from my local tax authorities (teeth-gnashingly).

-----------------------------------------------------------------
@Chris Guiver:

On my way to that discourse page i came to
  https://discourse.ubuntu.com/t/create-a-bootable-usb-stick-on-ubuntu/14011
where i see comments from "guiverc".
So, i assume that you can point the participants of
  https://discourse.ubuntu.com/t/install-ubuntu-desktop/25312
to my summary in

https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1922342/comments/125

Better warn them that the overall thread is long and full of wrong
theories. But meanwhile the diagnosis is clear.

As background you can point to

  https://bugs.launchpad.net/ubuntu-cdimage/+bug/1886148

where Ubuntu ISO production had to switch from MBR partition table to
GPT partitioning, because some buggy EFI implementations need it,
and to

  https://bugs.launchpad.net/ubuntu-cdimage/+bug/1899308

where Ubuntu ISO production had to add a MBR partition of type 0x00 with
boot flag for getting some buggy BIOS implementations to work again.
This boot flag partition is what slows down the boot process on the machines
which are reported at this bug (1922342).

If the need arises for discussing with me, then please on this bug
report.

Have a nice day :)

Thomas

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

Title:
  Impish live session takes ages to boot on BIOS systems

Status in Release Notes for Ubuntu:
  Fix Released
Status in casper package in Ubuntu:
  Fix Released
Status in casper source package in Impish:
  Won't Fix
Status in casper source package in Kinetic:
  Fix Released

Bug description:
  First of all, I change the description of this bug because, thanks to
  Chris Guiver comments, I could check that the live session effectively
  works but it takes too long to complete. That's why I change the
  description of the bug from live session does not boot to live session
  takes ages to boot. I hope this is the best approach to this.

  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, but more less than in this case.

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

  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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