After that any "apt install" and also "apt upgrade" happens with this error. sudo apt upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 7 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Setting up lvm2 (2.02.176-4.1ubuntu3) ... update-initramfs: deferring update (trigger activated) Failed to restart lvm2-lvmetad.service: Unit lvm2-lvmetad.socket is masked. invoke-rc.d: initscript lvm2-lvmetad, action "restart" failed. ● lvm2-lvmetad.service - LVM2 metadata daemon Loaded: loaded (/lib/systemd/system/lvm2-lvmetad.service; static; vendor preset: enabled) Active: inactive (dead) Docs: man:lvmetad(8) dpkg: error processing package lvm2 (--configure): installed lvm2 package post-installation script subprocess returned error exit status 1 dpkg: dependency problems prevent configuration of libguestfs0:amd64: libguestfs0:amd64 depends on lvm2; however: Package lvm2 is not configured yet. dpkg: error processing package libguestfs0:amd64 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libguestfs-reiserfs:amd64: libguestfs-reiserfs:amd64 depends on libguestfs0 (= 1:1.36.13-1ubuntu3); however: Package libguestfs0:amd64 is not configured yet. No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because MaxReports is reached already dpkg: error processing package libguestfs-reiserfs:amd64 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libguestfs-perl: libguestfs-perl depends on libguestfs0 (= 1:1.36.13-1ubuntu3); however: Package libguestfs0:amd64 is not configured yet. dpkg: error processing package libguestfs-perl (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libguestfs-hfsplus:amd64: libguestfs-hfsplus:amd64 depends on libguestfs0 (= 1:1.36.13-1ubuntu3); however: Package libguestfs0:amd64 is not configured yet. dpkg: error processing package libguestfs-hfsplus:amd64 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libguestfs-tools: libguestfs-tools depends on libguestfs0 (= 1:1.36.13-1ubuntu3); however: Package libguestfs0:amd64 is not configured yet. libguestfs-tools dependNo apport report written because MaxReports is reached already No apport report written because MaxReports is reached already s on libguestfs-perl (= 1:1.36.13-1ubuntu3); however: Package libguestfs-perl is not configured yet. dpkg: error processing package libguestfs-tools (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libguestfs-xfs:amd64: libguestfs-xfs:amd64 depends on libguestfs0 (= 1:1.36.13-1ubuntu3); however: Package libguestfs0:amd64 is not configured yet. dpkg: error processing package libguestfs-xfs:amd64 (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already Processing triggers for initramfs-tools (0.130ubuntu3) ... update-initramfs: Generating /boot/initrd.img-4.15.0-20-generic Errors were encountered while processing: lvm2 libguestfs0:amd64 libguestfs-reiserfs:amd64 libguestfs-perl libguestfs-hfsplus:amd64 libguestfs-tools libguestfs-xfs:amd64 E: Sub-process /usr/bin/dpkg returned an error code (1)