Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:
update-initramfs: Generating /boot/initrd.img-5.11.0-27-generic E: /usr/share/initramfs-tools/hooks/plymouth failed with return 1. update-initramfs: failed for /boot/initrd.img-5.11.0-27-generic with 1. Can you reproduce this failure by running "sudo update-initramfs -u"? ** Changed in: initramfs-tools (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1942135 Title: package initramfs-tools 0.136ubuntu6.6 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1942135/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs