*** This bug is a duplicate of bug 1866377 *** https://bugs.launchpad.net/bugs/1866377
I applied a workaround mentioned in bug #1866377, and this fixed the problem: user@laptop:/$ sudo apt purge --reinstall plymouth Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: libplymouth5 shimmer-themes xubuntu-wallpapers Use 'sudo apt autoremove' to remove them. The following packages will be REMOVED: lightdm* plymouth* plymouth-label* plymouth-theme-ubuntu-text* plymouth-theme-xubuntu-logo* plymouth-theme-xubuntu-text* xubuntu-artwork* xubuntu-core* xubuntu-default-settings* 0 upgraded, 0 newly installed, 9 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 2.450 kB disk space will be freed. Do you want to continue? [Y/n] y (Reading database ... 242908 files and directories currently installed.) Removing xubuntu-core (2.233) ... Removing lightdm (1.30.0-0ubuntu3.1) ... Removing xubuntu-default-settings (20.04) ... Removing xubuntu-artwork (20.04) ... update-alternatives: using /etc/newt/palette.ubuntu to provide /etc/newt/palette (newt-palette) in auto mode Removing plymouth-theme-xubuntu-text (20.04) ... update-alternatives: using /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth to provide /usr/share/plymouth/themes/text.plymouth (text.plymouth) in auto mode update-initramfs: deferring update (trigger activated) Removing plymouth-theme-xubuntu-logo (20.04) ... update-initramfs: deferring update (trigger activated) Removing plymouth-label (0.9.4git20200109-0ubuntu6) ... Removing plymouth-theme-ubuntu-text (0.9.4git20200109-0ubuntu6) ... update-initramfs: deferring update (trigger activated) Removing plymouth (0.9.4git20200109-0ubuntu6) ... update-initramfs: deferring update (trigger activated) Setting up initramfs-tools (0.136ubuntu1) ... update-initramfs: deferring update (trigger activated) Processing triggers for libglib2.0-0:i386 (2.64.0-1) ... Processing triggers for man-db (2.9.1-1) ... Processing triggers for libglib2.0-0:amd64 (2.64.0-1) ... (Reading database ... 242603 files and directories currently installed.) Purging configuration files for xubuntu-artwork (20.04) ... Purging configuration files for plymouth (0.9.4git20200109-0ubuntu6) ... Purging configuration files for plymouth-theme-ubuntu-text (0.9.4git20200109-0ubuntu6) ... Purging configuration files for xubuntu-default-settings (20.04) ... Purging configuration files for lightdm (1.30.0-0ubuntu3.1) ... dpkg: warning: while removing lightdm, directory '/var/lib/lightdm-data' not empty so not 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 I: The initramfs will attempt to resume from /dev/dm-2 I: (/dev/mapper/vgxubuntu-swap_1) I: Set the RESUME variable to override this. user@laptop:/$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1866425 Title: apt upgrade fails with an error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1866425/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs