In my case this interferes with kernel installations. Post-installation tries to update grub but the process fails and any subsequent steps are skipped. The way around this is to remove grub-common, install the new kernel and install grub again. Of course grub does not generate a grub.cfg file. The grub installation fails with the same error. root@radon:/home/ant# apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages have been kept back: linux-headers-generic linux-headers-server linux-image-generic 0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded. 3 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 linux-image-3.13.0-55-generic (3.13.0-55.94) ... Running depmod. update-initramfs: deferring update (hook will be called later) initrd.img(/boot/initrd.img-3.13.0-55-generic ) points to /boot/initrd.img-3.13.0-55-generic (/boot/initrd.img-3.13.0-55-generic) -- doing nothing at /var/lib/dpkg/info/linux-image-3.13.0-55-generic.postinst line 491. vmlinuz(/boot/vmlinuz-3.13.0-55-generic ) points to /boot/vmlinuz-3.13.0-55-generic (/boot/vmlinuz-3.13.0-55-generic) -- doing nothing at /var/lib/dpkg/info/linux-image-3.13.0-55-generic.postinst line 491. Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.13.0-55-generic /boot/vmlinuz-3.13.0-55-generic run-parts: executing /etc/kernel/postinst.d/dkms 3.13.0-55-generic /boot/vmlinuz-3.13.0-55-generic run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-55-generic /boot/vmlinuz-3.13.0-55-generic update-initramfs: Generating /boot/initrd.img-3.13.0-55-generic run-parts: executing /etc/kernel/postinst.d/pm-utils 3.13.0-55-generic /boot/vmlinuz-3.13.0-55-generic run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.13.0-55-generic /boot/vmlinuz-3.13.0-55-generic Generating grub configuration file ... grub-probe: error: disk `lvmid/uCggES-emwj-Lb0k-yUW2-OpiX-uNdC-buju7p/vA1BlD-je3U-8Bbt-qA8F-mbjo-0wiw-y8dR5S' not found. run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1 Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-3.13.0-55-generic.postinst line 1025. dpkg: error processing package linux-image-3.13.0-55-generic (--configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of linux-image-extra-3.13.0-55-generic: linux-image-extra-3.13.0-55-generic depends on linux-image-3.13.0-55-generic; however: Package linux-image-3.13.0-55-generic is not configured yet. dpkg: error processing package linux-image-extra-3.13.0-55-generic (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of linux-image-generic: linux-image-generic depends on linux-image-3.13.0-55-generic; however: Package linux-image-3.13.0-55-generic is not configured yet. linux-image-generic depends on linux-image-extra-3.13.0-55-generic; however: Package linux-image-extra-3.13.0-55-generic is not configured yet. dpkg: error processing package linux-image-generic (--configure): dependency problems - leaving unconfigured 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. Errors were encountered while processing: linux-image-3.13.0-55-generic linux-image-extra-3.13.0-55-generic linux-image-generic E: Sub-process /usr/bin/dpkg returned an error code (1) root@radon:/home/ant#