[Bug 1867130] Re: spinner theme doesn't support fsckd progress messages

[Sebastien Bacher]

Dimitri helped with debugging tips for the casper/checksum integration

* build the casper script used by the iso

$ apt source casper
$ cd casper-1.441/casper-md5check
$ make

* mount an iso
- download an ubuntu iso, daily or stable
$ sudo mount -o loop focal-desktop-amd64.iso /cdrom

* start plymouth
$ sudo plymouthd --no-daemon --debug

* ssh into the machine to be able to drive plymouth
$ sudo plymouth show-splash
$ sudo ./casper-md5check /cdrom /cdrom/md5sum.txt
(that's the utility built in step 1)

-> the splash screen displays the check details

Using ubuntu-logo it displays 3 lines
Using spinner it displays 1 line

So looks like that's one thing to fix in the spinner theme, support for
multiline text

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https://bugs.launchpad.net/bugs/1867130

Title:
  spinner theme doesn't support fsckd progress messages

Status in plymouth package in Ubuntu:
  Incomplete

Bug description:
  In ubuntu, systemd-fsckd & casper send fsckd: special status messages
  with progress of integrity checks of disks.

  It then prints something like Checking disk 1 of 3 (70%), in a
  separate message, such that one can still see keycodes message (ie.
  "press S to skip") or any other messages, i.e. "Please unlock drive
  nvme0n1p3".

  This is a regression from ubuntu-logo theme.

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