I am trying to install or remove any software but I am facing the error below:

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: active (exited) since Wed 2018-05-16 06:40:37 WAT; 1h 54min ago
     Docs: man:lvmetad(8)
    Tasks: 0 (limit: 4915)
   CGroup: /system.slice/lvm2-lvmetad.service

May 16 06:40:37 raikone-X555UB systemd[1]: Starting LSB: LVM2 metadata daemon...
May 16 06:40:37 raikone-X555UB systemd[1]: Started LSB: LVM2 metadata daemon.
dpkg: error processing package lvm2 (--configure):
 installed lvm2 package post-installation script subprocess returned error exit status 1
Processing triggers for shared-mime-info (1.9-2) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for initramfs-tools (0.130ubuntu3) ...
update-initramfs: Generating /boot/initrd.img-4.15.0-20-generic
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

I tried to follow some tutorials here but didn't work for me.

  • Now I tried: apt-get -f install dpkg --configure -a apt-get update apt-get clean apt-get autoclean apt-get autoremove apt-get check apt-get -m update apt-get dist-upgrade
    – JRH
    May 16, 2018 at 10:37

3 Answers 3


I've resolved this problem with:

sudo apt-get purge lvm2
sudo apt autoremove
sudo apt install lvm2

reboot the system, and new kernel should be installed. Furthermore, this discussion helped me.


If systemctl status lvm2-lvmetad returns Loaded: masked (/dev/null) you should unmask and enable it with

sudo systemctl unmask  lvm2-lvmetad && sudo systemctl enable lvm2-lvmetad

The command systemctl status lvm2-lvmetad.socket should return status confirming success.

If this approach doesn't work for you, you may have better luck with the purge/reinstall approach described here I would recommend having a good backup though.



  • @HelderJúnior I'm glad this solution worked for you. The way we say thank you here is by accepting/upvoting answers that were the most helpful to us. As I recall this is mentioned in the tour Cheers!
    – Elder Geek
    May 18, 2018 at 16:48
  • Thank you for this answer, this was a much better solution than purging and reinstalling lvm2! I had to unmask a few other things too in my particular case, but once I had the idea down it was just iteration.
    – Doktor J
    Mar 19, 2019 at 18:25

I just encountered the same issue. In my case I ran the following commands to solve it:

sudo /bin/rm -rf /etc/lvm/  
sudo rm -rf /etc/lvm/backup/
sudo apt purge lvm2
sudo updatdb
sudo locate lvm2
sudo rm /var/crash/lvm2.0.crash
sudo rm /etc/systemd/system/lvm2-*
sudo rm /etc/systemd/system/sysinit.target.wants/lvm2-*
sudo apt install lvm2
sudo apt update
sudo apt upgrade

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