[Bug 2084032] Re: pc-kernel umount failure

[Sergio Costas]

Flaja94: Mmm... that sounds more like a hardware problem... can you
check the journal to see if there is something odd? Also, when the
system boots, press ESC to hide the bootsplash and be able to see the
boot messages; maybe there is something useful...

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https://bugs.launchpad.net/bugs/2084032

Title:
  pc-kernel umount failure

Status in subiquity:
  Fix Committed
Status in ubuntu-desktop-provision:
  Triaged
Status in subiquity package in Ubuntu:
  Fix Committed
Status in subiquity source package in Noble:
  Fix Released
Status in subiquity source package in Plucky:
  Fix Committed

Bug description:
  Doing some install tests with the Oracular October 8 ISO, I had an
  installer crash.

  I booted with a live system and proceed to wipe the internal SSD hard
  disk using `blkdiscard -f /dev/sda` (this disk is quite old, so it's
  recognized as a SATA one, not as a NVME). After that, I completely
  shut down the computer, and booted the Oracular Desktop LiveCD using
  an USB stick created with the October, 8 ISO. I chose "Spanish" and
  "Spanish keyboard", no `accessibility` options, connected to my WiFi
  (no Ethernet available in the laptop), clicked next, next, chose
  `extended selection` to install "all the stuff", clicked next, marked
  both `Install third party software for graphics and WiFi hardware` and
  `Download and install support for additional media formats`, and when
  I press the `Next` button, the installer crashed.

  I attach the contents of the `/var/log` folder.

  I also checked the first 400KBytes of the hard disk, and it's all
  zeros. No data there, as expected after a `blkdiscard`.

  The laptop is an Asus Zenbook UX21E from 2012, with 4GBytes of RAM,
  with an Intel Core i5-2467M CPU.

  The bug can be consistently reproduced after using `blkdiscard`. But
  if the disk has partitions, it doesn't seem to fail.

  I didn't test with other languages. Also, didn't test using `normal
  selection` or not marking `third party drivers` or `additional media
  format`. Only tested that specific combination.

  No FDE/TPM install is being done (the laptop is too old for that).

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