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

[Thomas Schmitt]

Hi,

José Marinho:
> Well, I try the first method (compiling xorriso) and removing the if
> condition from grub.cfg keeping grub_platform command. The usb drive now has
> a GPT partition table but unfortunately, the issue persists so, it seems
> that the grub_platform thing is not the cause.

Remove the grub_platform command and try again.

Initially we thought that removing all five lines had helped. But that
test has to be repeated, now that we have to expect that this success was
due to the partition table changes.

If the repeated test with no command grub_platform shows that the problem is
gone, then the test result with just no "if"-lines would tell us that indeed
the command is to blame for the long delay.

If removing all five lines does not help, then the error message about
grub_platform is just an unrelated complaint.

-----------------------------------------------------------------------------

> If any other test is needed don't hesitate on ask me, but for today I have
> enough, so perhaps I'll take a while on doing it.

Please try what i proposed to Lucap in comment #45
  https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1922342/comments/45
(beware of swallowed blanks, see #46)

Somehow the quite marginal changes of gnome disk prevent the problem.
The proposed dd runs manipulate the GPT, veterinarian style.

If all we need to do is to set the flags of GPT partition 1 to
  0x1000000000000005
then i could quite directly provide a remedy in GNU xorriso-1.5.5.

Further there would be a veterinary solution for the time being.
The biggest obstacle would be to get byte value 5 by shell means.
In bash there is a special form of quoting:

  echo $'\005' | dd bs=1 count=1 conv=notrunc seek=1072 of="$NEW"

In dash the built-in echo command interprets backslashes on its own:

  echo '\005' | dd bs=1 count=1 conv=notrunc seek=1072 of="$NEW"

Have a nice day :)

Thomas

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

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

Status in casper package in Ubuntu:
  Confirmed

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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