I appended 'set -x' directly after the existing 'set -e' in plymouth, then ran 'sudo update-initramfs -u'. The result is attached in output.txt and written below:
update-initramfs: Generating /boot/initrd.img-6.2.0-34-generic + OPTION=FRAMEBUFFER + PREREQ= + prereqs + echo + exit 0 + OPTION=FRAMEBUFFER + PREREQ= + . /usr/share/initramfs-tools/hook-functions + update-alternatives --query default.plymouth + sed -e /^Value:/!d -e s/^Value: \(.*\)/\1/ + THEME_PATH=/usr/share/plymouth/themes/bgrt/bgrt.plymouth + basename /usr/share/plymouth/themes/bgrt/bgrt.plymouth .plymouth + THEME=bgrt + THEMES=/usr/share/plymouth/themes + [ -n /usr/share/plymouth/themes/bgrt/bgrt.plymouth ] + grep ImageDir *= * /usr/share/plymouth/themes/bgrt/bgrt.plymouth + sed s/ImageDir *= *// + IMAGE_PATH=/usr/share/plymouth/themes/spinner + [ -n /usr/share/plymouth/themes/spinner ] + [ /usr/share/plymouth/themes/bgrt/bgrt.plymouth != /usr/share/plymouth/themes/spinner ] + basename /usr/share/plymouth/themes/spinner + IMAGE_NAME=spinner + mkdir -p /var/tmp/mkinitramfs_SWWOCa//usr/share/plymouth/themes + [ -n bgrt ] + [ bgrt != none ] + THEME_NAME=bgrt + THEME=/usr/share/plymouth/themes/bgrt/bgrt.plymouth + ln -s /usr/share/plymouth/themes/bgrt/bgrt.plymouth /var/tmp/mkinitramfs_SWWOCa//usr/share/plymouth/themes/default.plymouth + plymouth --get-splash-plugin-path + PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/plymouth/ + update-alternatives --query text.plymouth + sed -e /^Value:/!d -e s/^Value: \(.*\)/\1/ + TEXTTHEME_PATH=/usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth + basename /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth .plymouth + TEXTTHEME=ubuntu-text + [ ubuntu-text != none ] + TEXTTHEME_NAME=ubuntu-text + TEXTTHEME=/usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth + + ln -s /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth /var/tmp/mkinitramfs_SWWOCa//usr/share/plymouth/themes/text.plymouth [ -n ubuntu-text ] + [ ! -r /usr/share/plymouth/themes/bgrt/bgrt.plymouth ] + currthemes=bgrt ubuntu-text spinner + PLUGINS=details.so label.so + sed -n s/^ModuleName=\(.*\)/\1/p /usr/share/plymouth/themes/bgrt/bgrt.plymouth + MODULE=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so + [ ! -e /usr/lib/x86_64-linux-gnu/plymouth//two-step.so ] + copy_exec /usr/lib/x86_64-linux-gnu/plymouth//two-step.so + local src target x nonoptlib ret + src=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so + target=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so + copy_file binary /usr/lib/x86_64-linux-gnu/plymouth//two-step.so /usr/lib/x86_64-linux-gnu/plymouth//two-step.so + local type src target link_target + type=binary + src=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so + target=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so + [ -f /usr/lib/x86_64-linux-gnu/plymouth//two-step.so ] + [ -d /var/tmp/mkinitramfs_SWWOCa//usr/lib/x86_64-linux-gnu/plymouth//two-step.so ] + [ -e /var/tmp/mkinitramfs_SWWOCa//usr/lib/x86_64-linux-gnu/plymouth//two-step.so ] + mkdir -p /var/tmp/mkinitramfs_SWWOCa//usr/lib/x86_64-linux-gnu/plymouth/ + [ -h /usr/lib/x86_64-linux-gnu/plymouth//two-step.so ] + [ n = y ] + cp -pP /usr/lib/x86_64-linux-gnu/plymouth//two-step.so /var/tmp/mkinitramfs_SWWOCa//usr/lib/x86_64-linux-gnu/plymouth//two-step.so + env --unset=LD_PRELOAD ldd /usr/lib/x86_64-linux-gnu/plymouth//two-step.so + sed -e /\//!d; /linux-gate/d; /=>/ {s/.*=>[[:blank:]]*\([^[:blank:]]*\).*/\1/}; s/[[:blank:]]*\([^[:blank:]]*\) (.*)/\1/ + echo /usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + sed -e s#/lib/\([^/]*/\)\?\(tls\|i686\|sse2\|neon\|vfp\).*/\(lib.*\)#/lib/\1\3# + nonoptlib=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + echo /usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + sed -e s#-linux-gnu/\(tls\|i686\|sse2\|neon\|vfp\).*/\(lib.*\)#-linux-gnu/\2# + nonoptlib=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + [ -e /usr/lib/x86_64-linux-gnu/plymouth//two-step.so: ] + copy_file binary /usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + local type src target link_target + type=binary + src=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + target=/usr/lib/x86_64-linux-gnu/plymouth//two-step.so: + [ -f /usr/lib/x86_64-linux-gnu/plymouth//two-step.so: ] + return 2 + ret=2 + [ 2 = 1 ] + return 1 E: /usr/share/initramfs-tools/hooks/plymouth failed with return 1. update-initramfs: failed for /boot/initrd.img-6.2.0-34-generic with 1. ** Attachment added: "output.txt" https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2046570/+attachment/5729596/+files/output.txt -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/2046570 Title: package initramfs-tools 0.140ubuntu13.4 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1 Status in initramfs-tools package in Ubuntu: Incomplete Bug description: Received the error after accepting an automatic system update. ProblemType: Package DistroRelease: Ubuntu 22.04 Package: initramfs-tools 0.140ubuntu13.4 ProcVersionSignature: Ubuntu 6.2.0-34.34~22.04.1-generic 6.2.16 Uname: Linux 6.2.0-34-generic x86_64 NonfreeKernelModules: lkp_Ubuntu_6_2_0_34_34_generic_99 wl zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: pass Date: Fri Dec 15 11:19:44 2023 ErrorMessage: installed initramfs-tools package post-installation script subprocess returned error exit status 1 InstallationDate: Installed on 2023-10-11 (64 days ago) InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2) PackageArchitecture: all Python3Details: /usr/bin/python3.10, Python 3.10.12, python3-minimal, 3.10.6-1~22.04 PythonDetails: N/A RelatedPackageVersions: dpkg 1.21.1ubuntu2.2 apt 2.4.11 SourcePackage: initramfs-tools Title: package initramfs-tools 0.140ubuntu13.4 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2046570/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp