Hello Steve,

> * still showing WARNING:Failed to connect to lvmetad. Falling back to
device scanning.

> That is NOT the defining symptom of the bug. This message would always
be shown. The question is whether there is an unreasonable and
unnecessary boot delay after the message is displayed.

I have followed the same steps as Marc Pignat (who you quoted) and can
confirm that I am still getting the problem. To clarify, I am getting
the same unreasonable and unnecessary boot delay after the message is
displayed, as I was getting before upgrading the package.

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Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1768230

Title:
  Long time booting : Failed to connect to lvmetad. Falling back to
  device scanning.

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in ubiquity package in Ubuntu:
  Fix Released
Status in initramfs-tools source package in Bionic:
  Fix Committed
Status in ubiquity source package in Bionic:
  Fix Released

Bug description:
  [SRU Justification]
  A regression in initramfs-tools causes it to autogenerate config in the 
initramfs saying to resume from any available swap devices, but references the 
swap device by UUID, which is not a canonical form for referring to LVM volumes 
(because of snapshotting, they are not unique).  Ubiquity also generates a file 
in /etc at install time which references the swap partition in the same way.  
Since the lvm2 initramfs hooks also only activate precisely those LVs that are 
detected as needed at boot, this adds an inappropriate 30-second boot delay to 
any system with swap on LVM, which includes any desktop system that was 
configured with LVM (but not full-disk encryption) at install time.

  [Test case]
  1. Install using the "Use LVM" option in the desktop installer.
  4. Reboot.
  5. Verify that dmesg shows a 30-second delay before mounting the root 
filesystem.
  6. Install initramfs-tools from bionic-proposed.
  7. Reboot.
  8. Verify that dmesg no longer shows a 30-second delay before mounting the 
root filesystem.
  9. Install using the bionic daily image that contains the ubiquity from 
bionic-proposed.
  10. Reboot.
  11. Verify that /etc/initramfs-tools/conf.d/resume is not present and that 
there is no delay before mounting the root filesystem.

  [Regression potential]
  This makes changes to shell scripts, and shell is a perilous language. An 
unnoticed bug could cause all initramfs generation, and thus all kernel 
installation, to fail for some users. A regression could also cause a user to 
lose hiberation support that they currently have.

  [Original description]
  After choosing "Erase disk and install ubuntu" + "Use LVM with the new Ubuntu 
installation", the
  system is very slow to reboot.

  It shows the message : "WARNING:Failed to connect to lvmetad. Falling back to 
device scanning.",
  then waits 32 seconds, then continues as it should.

  I think this is a ubiquity bug, since the d-i based installer is not affected.
   - ubuntu-18.04-desktop-amd64.iso 
(a55353d837cbf7bc006cf49eeff05ae5044e757498e30643a9199b9a25bc9a34) : affected
   - xubuntu-18.04-desktop-amd64.iso 
(7c24318d3b1de1efd584b5aea034ce1aafd2d0f06c59812d989a5fc95bf947e3) : affected
   - ubuntu-18.04-server-amd64.iso 
(a7f5c7b0cdd0e9560d78f1e47660e066353bb8a79eb78d1fc3f4ea62a07e6cbc) : not 
affected

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