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

[sudodus]

@Michael Hudson-Doyle,

The bug might not appear in your VM.

I think a very very detailed instruction to do what I did is to

1. Work in *buntu 18.04.x LTS which is updated and full-upgraded to be
up to date

2. Install mkusb-plug according to comment #14

3. zsync any current Ubuntu desktop Focal daily iso file (Lubuntu and
Xubuntu have the smallest iso files). You may want to try with a
corresponding Ubuntu 19.10 iso file to see how it should work.

4. I have several brand names and sizes of USB pendrives, but I often
use Sandisk Extreme 16 GB. The bug appears with different brand names
and sizes, so I think you will get similar results with the USB
pendrives that are available.

5. Use mkusb-plug to create a persistent live drive in a USB pendrive.
There is a wizard-style user interface, and I think you will use it the
right way. Otherwise you can ask.

6. Move the pendrive to another computer and boot it. For me it will
boot live-only, but after re-labeling the drive to 'writable' and reboot
there will be persistence. The bug appears both in the old style BIOS
mode and UEFI mode.

As described earlier, this bug appeared some weeks ago. Persistence
works with 19.10 and with Focal with casper version 1.438build1 when
using the old style label 'casper-rw'.

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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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