[Bug 1866377] Re: update-initramfs fails on plymouth hook due to missing target dir

[Tony Travis]

Richard's magic work-around WFM:

apt purge --reinstall plymouth
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  libplymouth5
Use 'apt autoremove' to remove it.
The following packages will be REMOVED
  lightdm* plymouth* plymouth-label* plymouth-theme-spinner* plymouth-theme-ubuntu-mate-logo* plymouth-theme-ubuntu-mate-text* plymouth-theme-ubuntu-text* slick-greeter*
0 to upgrade, 0 to newly install, 8 to remove and 0 not to upgrade.
1 not fully installed or removed.
[...]
Processing triggers for systemd (244.3-1ubuntu1) ...
Processing triggers for dbus (1.12.16-2ubuntu2) ...
Processing triggers for initramfs-tools (0.136ubuntu1) ...
update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic

apt autoremove
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED
  libplymouth5
0 to upgrade, 0 to newly install, 1 to remove and 0 not to upgrade.
After this operation, 425 kB disk space will be freed.
Do you want to continue? [Y/n] 
(Reading database ... 503753 files and directories currently installed.)
Removing libplymouth5:amd64 (0.9.4git20200109-0ubuntu6) ...
Processing triggers for libc-bin (2.30-0ubuntu3) ...

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https://bugs.launchpad.net/bugs/1866377

Title:
  update-initramfs fails on plymouth hook due to missing target dir

Status in plymouth package in Ubuntu:
  Confirmed

Bug description:
  Testing pre-release Ubuntu-MATE 20.04 updated on Fri 6 Mar 2020

  lsb_release -d
  Description:	Ubuntu Focal Fossa (development branch)
  uname -a
  Linux beluga 5.4.0-14-generic #17-Ubuntu SMP Thu Feb 6 22:47:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

  update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic
  cp: cannot create regular file '/var/tmp/mkinitramfs_npYdVL/usr/share/plymouth/themes/spinner/watermark.png': No such file or direct
  ory
  E: /usr/share/initramfs-tools/hooks/plymouth failed with return 1.
  update-initramfs: failed for /boot/initrd.img-5.4.0-14-generic with 1.
  dpkg: error processing package initramfs-tools (--configure):
   installed initramfs-tools package post-installation script subprocess returned error exit status 1
  Processing triggers for libc-bin (2.30-0ubuntu3) ...
  Errors were encountered while processing:
   initramfs-tools

  [Same error on two different systems]

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