Was getting similar errors on on subsequent `sudo apt upgrade`s - worked around by freeing boot space as suggested in https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1899907
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1929212 Title: package initramfs-tools 0.136ubuntu6.4 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/1929212/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs