Last couple of upgrades have seen similar results to the below: Generating grub configuration file ... File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9473: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9473: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9486: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9486: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9499: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9499: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9512: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9512: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9572: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 9572: /usr/sbin/grub-probe Found linux image: /boot/vmlinuz-4.4.0-66-generic Found initrd image: /boot/initrd.img-4.4.0-66-generic Found linux image: /boot/vmlinuz-4.4.0-65-generic Found initrd image: /boot/initrd.img-4.4.0-65-generic Found linux image: /boot/vmlinuz-4.4.0-64-generic Found initrd image: /boot/initrd.img-4.4.0-64-generic File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 10044: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on vgs invocation. Parent PID 10044: /usr/sbin/grub-probe File descriptor 3 (pipe:[53933]) leaked on lvs invocation. Parent PID 10213: /bin/sh Failed to probe /dev/sdb1 for filesystem type Failed to probe /dev/sdc1 for filesystem type Failed to probe /dev/sdd1 for filesystem type done update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults Processing triggers for libc-bin (2.23-0ubuntu5) ...Processing triggers for initramfs-tools (0.122ubuntu8.8) ... update-initramfs: Generating /boot/initrd.img-4.4.0-66-generic
