Running Debian 12.6, then upgrading to 12.8, I get an error.
Trying again I still get: $ sudo apt upgrade Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] y Setting up initramfs-tools (0.142+rpt2+deb12u1) ... update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools (0.142+rpt2+deb12u1) ... dpkg: error processing package initramfs-tools (--configure): installed initramfs-tools package post-installation script subprocess returned error exit status 1 Errors were encountered while processing: initramfs-tools E: Sub-process /usr/bin/dpkg returned an error code (1) ## Following hints (on the ubuntu-users list) I download the older packages and do: $ sudo dpkg -i initramfs-tools-core_0.142+rpt1+deb12u1_all.deb initramfs-tools_0.142+rpt1+deb12u1_all.deb dpkg: warning: downgrading initramfs-tools-core from 0.142+rpt2+deb12u1 to 0.142+rpt1+deb12u1 (Reading database ... 281488 files and directories currently installed.) Preparing to unpack initramfs-tools-core_0.142+rpt1+deb12u1_all.deb ... Unpacking initramfs-tools-core (0.142+rpt1+deb12u1) over (0.142+rpt2+deb12u1) ... Preparing to unpack initramfs-tools_0.142+rpt1+deb12u1_all.deb ... Unpacking initramfs-tools (0.142+rpt1+deb12u1) over (0.142+rpt1+deb12u1) ... Setting up initramfs-tools-core (0.142+rpt1+deb12u1) ... Setting up initramfs-tools (0.142+rpt1+deb12u1) ... update-initramfs: deferring update (trigger activated) Processing triggers for man-db (2.11.2-2) ... Processing triggers for initramfs-tools (0.142+rpt1+deb12u1) ... update-initramfs: Generating /boot/initrd.img-6.1.0-27-686-pae W: mkconf: MD subsystem is not loaded, thus I cannot scan for arrays. W: mdadm: failed to auto-generate temporary mdadm.conf file. $ apt list initramfs-tools-core initramfs-tools Listing... Done initramfs-tools-core/stable,stable 0.142+rpt2+deb12u1 all [upgradable from: 0.142+rpt1+deb12u1] initramfs-tools/stable,stable 0.142+rpt2+deb12u1 all [upgradable from: 0.142+rpt1+deb12u1] ## Then just to confirm this was the problem, allow the upgrade: $ sudo apt upgrade upgrades +rpt1 to +rpt2 and reinstates the failure... FYI -- Eyal at Home (e...@eyal.emu.id.au)