cp: cannot create regular file '/var/tmp/mkinitramfs_xv1OBM/usr/share/plymouth/themes/spinner/watermark.png': No such file or directory

[Haw Loeung]

| I: /boot/vmlinuz is now a symlink to vmlinuz-5.4.0-17-generic
| I: /boot/initrd.img is now a symlink to initrd.img-5.4.0-17-generic
| Setting up linux-modules-extra-5.4.0-17-generic (5.4.0-17.21) ...
| Setting up linux-image-generic (5.4.0.17.20) ...
| Setting up linux-generic (5.4.0.17.20) ...
| Processing triggers for initramfs-tools (0.136ubuntu1) ...
| update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic
| cp: cannot create regular file '/var/tmp/mkinitramfs_iUmuVn/usr/share/plymouth/themes/spinner/watermark.png': No such file or directory
| 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

Had to edit /usr/share/initramfs-tools/hooks/plymouth adding an 'mkdir -p' per attached patch.

| plymouth:
| Installed: 0.9.4git20200109-0ubuntu6
| Candidate: 0.9.4git20200109-0ubuntu6
| Version table:
| *** 0.9.4git20200109-0ubuntu6 500
| 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
| 100 /var/lib/dpkg/status

[Haw Loeung (hloeung)]

Likely a duplicate of LP:1866377