[Bug 1863672] Re: The 'new' persistent live method starting in 19.10 no longer works

[Michael Hudson-Doyle]

Hi, I've uploaded yet another initrd -- I think this one might fix the
bug, hopefully. It seems that for whatever reason, it takes a long time
for the block device to show up at all in your system (seems it's more
the kernel being slow rather than udev lagging behind which is what I
suspected at first). It also I guess means that the chances of
encountering this bug might depend on the model of the motherboard of
the system or something equally crazy.

So what I've done is to just delay the check for the /dev/disk/by-label
/casper-rw to later. It's a bit unsatisfactory but I'm reasonably
confident this will work (because if the device hasn't appeared by this
point, persistence would not work with a writable filesystem label
either). Please let me know how it goes.

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https://bugs.launchpad.net/bugs/1863672

Title:
  The 'new' persistent live method starting in 19.10 no longer works

Status in casper package in Ubuntu:
  Confirmed

Bug description:
  I am iso-testing Focal Fossa and I am creating and maintaining tools
  to create live and persistent live USB drives. Lubuntu Focal daily
  live dated 2020-02-12 works. But the current version of Lubuntu Focal
  dated 2020-02-16 (zsynced approx. one hour ago) does not work when
  using exactly the same method using mkusb-plug, that edits the iso
  file to replace 'quiet splash' with 'persistent  ' /12 characters/ and
  creating an ext partition behind it.

  I noticed that the version of casper has changed from 1.438build1
  (when it worked) to 1.439 so I suspect that this has caused the
  failure.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: casper 1.439
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  Uname: Linux 5.4.0-14-generic x86_64
  ApportVersion: 2.20.11-0ubuntu16
  Architecture: amd64
  CasperVersion: 1.439
  CurrentDesktop: LXQt
  Date: Mon Feb 17 20:54:54 2020
  LiveMediaBuild: Lubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200216)
  SourcePackage: casper
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.casper.conf: 2020-02-17T20:52:45.667205

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