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

[Thomas Schmitt]

Hi,

Chris Guiver (guiverc) wrote:
> (1) wiped thumb-drive
> (2) `mkusb-plug groovy-desktop-amd64.iso` (option N or non-persistent
> was selected)

Is (2) equivalent to a plain copy by dd or cp ?

> I booted again (still same thumb-drive) without issue on
> - hp dc7700
> and booted successfully on hp dc7900 

Did they previously fail with plain copies of the Ubuntu ISOs ?

If so, then it could be that step (1) erased an old GPT backup at the
end of the USB stick, which made the whole stick suspicious when there
was a valid but not matching GPT at its start.
With MBR partition table in the ISOs, there would have been no need to
look for a backup GPT at the end.

This theory would be wrong if the plain copy methods included a wipe
of the last block of the USB stick, as i let xorriso-dd-target do.

@sudodus: Can you confirm or refute this theory from the reports in
this thread ?

If the theory stays valid:
Have those machines, which demanded a boot flag, been tested with no GPT
backup at the end of the USB stick ?

It could be that the boot flag keeps EFI from looking for a backup GPT
and thus from taking offense if it does not match the main GPT.
(I confess that this is far fetched. But we already went through most of
the not so wayward possibilities.)

---

Always valid is the theory about hardware allergies. It is not explainable
to me why my "128 GB" Intenso Ultra Line rev 1.00 does not work in the
USB 3 sockets of my new machine, although it was sold and is advertised as
USB 3.0 device.

Have a nice day :)

Thomas

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to cd-boot-images-amd64 in Ubuntu.
https://bugs.launchpad.net/bugs/1899308

Title:
  failure to boot groovy daily  (again)

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

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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