[Bug 1899308] Re: failure to boot groovy daily (again)

[sudodus]

The current Ubuntu Desktop (standard Ubuntu) Groovy version dated Okt 17
08:30 from zsync,

- '20201017' in the testing tracker

ls -l groovy-desktop-amd64.iso
-rw------- 1 sudodus sudodus 2942062592 okt 17 08:30 groovy-desktop-amd64.iso

$ sha256sum groovy-desktop-amd64.iso
f572ff624215e00b398233be6a9e482d41b706c24266ed05bd019a6ab75bf53d  groovy-desktop-amd64.iso

when cloned to a USB3 pendrive, can boot

- an old HP Elitebook 8560p (in BIOS mode) - This was problematic in the
previous daily iso file, it booted only the first time. Now it booted
successfully 3 times in a row. The 300K partition is preserved and the
ext4 partition is created correctly (and preserved between boots).

- a middle-aged Dell Precision M4800 (in BIOS mode and UEFI mode) -
Works as usual.

- a newer Lenovo V130 (in UEFI mode with secure boot) - Works since GUID
partition table.

-o-

I tested with a second USB drive, this time an SSD connected via a USB3
to SATA adapter and cloned from the iso file.

- I started booting the Lenovo V130 in UEFI mode with secure boot (and
let it create the ext4 partition). The 300K partition is preserved and
the ext4 partition is created correctly.

- Then I tested with the previously problematic HP Elitebook 8560p (in
BIOS mode). It booted as it should.

-o-

It looks like you have squashed this bug. Thanks Thomas and Steve :-)

The current Ubuntu Desktop Groovy iso file works with both the old HPs
and old Dells and the newer computers that we have tested.

However there are many other computer brands and models, that are not
tested yet. Let us hope that there will be no severe backlash.

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https://bugs.launchpad.net/bugs/1899308

Title:
  failure to boot groovy daily  (again)

Status in Ubuntu CD Images:
  Fix Released
Status in casper package in Ubuntu:
  Fix Released
Status in cd-boot-images-amd64 package in Ubuntu:
  Invalid

Bug description:
  This is either a duplicate or return of
  - https://bugs.launchpad.net/ubuntu-cdimage/+bug/1883040
  - https://bugs.launchpad.net/ubuntu-cdimage/+bug/1886148

  Most probably "groovy daily won't boot anymore on some older BIOS
  boxes" or the 1883040 bug, as it's impacting only my older slow boxes
  (but it's also different).

  thumb-drive has been successfully used in QA live & install tests,
  however it won't boot on

  hp dc7700 (c2d-e6320, 5gb, nvidia quadro nvs 290)
  hp dc7900 (c2d-e8400, 4gb, intel 4 series integrated i915)

  The last timing issue also impacted d755-5 (older dell optiplex 755)
  when dc7700 was impacted, but that booted successfully this ISO.

  I see thumb-drive flash as it tries to boot, eventually it stops
  flashing, but no boot. At least 6 attempts made to boot, thumb-drive
  being tested on another 2x d755 boxes..

  (ISO written by mkusb/dus & gnome-disks [#11] is identical)

  ** Expected result

  It boots & is usable

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