Just doing an "apt-get dist-upgrade" on a 16.04 VM:
... Setting up grub-common (2.02~beta2-36ubuntu3.11) ... Installing new version of config file /etc/grub.d/10_linux ... update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults Setting up grub-pc-bin (2.02~beta2-36ubuntu3.11) ... Setting up grub2-common (2.02~beta2-36ubuntu3.11) ... Setting up grub-pc (2.02~beta2-36ubuntu3.11) ... Installing for i386-pc platform. File descriptor 3 (pipe:[136263]) leaked on vgs invocation. Parent PID 18940: grub-install File descriptor 3 (pipe:[136263]) leaked on vgs invocation. Parent PID 18940: grub-install File descriptor 3 (pipe:[136263]) leaked on vgs invocation. Parent PID 18940: grub-install Installation finished. No error reported. Generating grub configuration file ... Found linux image: /boot/vmlinuz-4.4.0-83-generic Found initrd image: /boot/initrd.img-4.4.0-83-generic Found linux image: /boot/vmlinuz-4.4.0-21-generic Found initrd image: /boot/initrd.img-4.4.0-21-generic done ... Setting up initramfs-tools-core (0.122ubuntu8.8) ... Setting up initramfs-tools (0.122ubuntu8.8) ... update-initramfs: deferring update (trigger activated) Setting up mdadm (3.3-2ubuntu7.2) ... update-initramfs: deferring update (trigger activated) Generating grub configuration file ... File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19859: grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19859: grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19899: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19899: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19909: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19909: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19919: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19919: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19929: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19929: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19979: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19979: /usr/sbin/grub-probe Found linux image: /boot/vmlinuz-4.4.0-83-generic Found initrd image: /boot/initrd.img-4.4.0-83-generic File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20061: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20061: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20072: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20072: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20082: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20082: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20092: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20092: /usr/sbin/grub-probe Found linux image: /boot/vmlinuz-4.4.0-21-generic Found initrd image: /boot/initrd.img-4.4.0-21-generic File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20335: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20335: /usr/sbin/grub-probe File descriptor 3 (pipe:[140340]) leaked on lvs invocation. Parent PID 20417: /bin/sh done update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults ...
It updated 119 packages, but lvm2 was not one of them.
Just doing an "apt-get dist-upgrade" on a 16.04 VM:
... 36ubuntu3. 11) ... d/10_linux ... 36ubuntu3. 11) ... 36ubuntu3. 11) ... 36ubuntu3. 11) ... 4.4.0-83- generic img-4.4. 0-83-generic 4.4.0-21- generic img-4.4. 0-21-generic tools-core (0.122ubuntu8.8) ... grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe 4.4.0-83- generic img-4.4. 0-83-generic grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe grub-probe 4.4.0-21- generic img-4.4. 0-21-generic grub-probe grub-probe
Setting up grub-common (2.02~beta2-
Installing new version of config file /etc/grub.
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
Setting up grub-pc-bin (2.02~beta2-
Setting up grub2-common (2.02~beta2-
Setting up grub-pc (2.02~beta2-
Installing for i386-pc platform.
File descriptor 3 (pipe:[136263]) leaked on vgs invocation. Parent PID 18940: grub-install
File descriptor 3 (pipe:[136263]) leaked on vgs invocation. Parent PID 18940: grub-install
File descriptor 3 (pipe:[136263]) leaked on vgs invocation. Parent PID 18940: grub-install
Installation finished. No error reported.
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-
Found initrd image: /boot/initrd.
Found linux image: /boot/vmlinuz-
Found initrd image: /boot/initrd.
done
...
Setting up initramfs-
Setting up initramfs-tools (0.122ubuntu8.8) ...
update-initramfs: deferring update (trigger activated)
Setting up mdadm (3.3-2ubuntu7.2) ...
update-initramfs: deferring update (trigger activated)
Generating grub configuration file ...
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19859: grub-probe
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19859: grub-probe
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19899: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19899: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19909: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19909: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19919: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19919: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19929: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19929: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19979: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 19979: /usr/sbin/
Found linux image: /boot/vmlinuz-
Found initrd image: /boot/initrd.
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20061: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20061: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20072: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20072: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20082: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20082: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20092: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20092: /usr/sbin/
Found linux image: /boot/vmlinuz-
Found initrd image: /boot/initrd.
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20335: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on vgs invocation. Parent PID 20335: /usr/sbin/
File descriptor 3 (pipe:[140340]) leaked on lvs invocation. Parent PID 20417: /bin/sh
done
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
...
It updated 119 packages, but lvm2 was not one of them.