[Bug 1905491] Re: Recent (Nov 2020) ISO copied to USB Drive cannot load

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Bug reporting is mostly about finding & fixing problems thus preventing
future users from hitting the same bug.

Ubuntu 20.10 was released in 2020-October (thus it's 20.10) and there
have been no Ubuntu releases in November unless you include
development/test releases (20.04.2, hirsute (21.04) etc)

There is no evidence of validate of ISO (esp. given the date stamp on
the file you mention is wrong), etc. so I'd suggest it's a support
issue.

I believe would be more appropriate, eg.
https://answers.launchpad.net/ubuntu. You can also find help with your
problem in the support forum of your local Ubuntu community
http://loco.ubuntu.com/ or asking at https://askubuntu.com or
https://ubuntuforums.org, or for more support options please look at
https://discourse.ubuntu.com/t/community-support/709

I've accordingly marked this incomplete, if you believe I'm in error, or
you've verified your ISO & believe it is an actual bug in the
software/ISO, you can leave another message on this report and change
the status back to "New".  Please also provide specific details as to
ISO, the sha256sums etc & details of how you verified they were valid.


FYI:  Yes a number of changes were made during the groovy cycle in the way systems are booted, and they were gradually fixed as detected, eg. https://bugs.launchpad.net/bugs/1883040 https://bugs.launchpad.net/bugs/1886148 & others.  You however haven't provided proof that normal validation of ISOs has been performed, checksums of ISOs matching what they should be etc.

** Changed in: ubuntu
       Status: New => Incomplete

** Package changed: ubuntu => casper (Ubuntu)

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https://bugs.launchpad.net/bugs/1905491

Title:
  Recent (Nov 2020) ISO copied to USB Drive cannot load

Status in casper package in Ubuntu:
  Incomplete

Bug description:
  2020-11-24 10:58 GMT Downloaded ubuntu-20.10-desktop-amd64.iso  via
  torrent

  Used Startup Disk Creator on two previously working 4GB USB sticks

  Both Print GRUB  then  "Error can't find grub_platform"

  Show a boxed Ubuntu Studio but no live OS is loaded

  Tried on two BIOS based 4core/6core AMD computers - same outcome.

  USB stick can be used to mount ISO ->   /boot   contains some grub
  files

  
  Problem is identical on  :-
  ubuntu-20.10-live server-amd.iso
  ubuntu-20.04.1-live server-amd.iso
  kubuntu-20.04-desktop-amd64.iso

  I suspect that a change in the creation of these ISOs is causing NON-
  UEFI machines to fail to load Grub2 correctly.

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