14.04 - Do I "need" DKMS? - Ask Ubuntu
https://askubuntu.com/questions/65360328.07.2015 · If you do not have dkms modules installed, you do not need the dkms package. It is not installed by default in Ubuntu. When you install some proprietary drivers, like Nvidia, AMD or Broadcom, dkms package is automatically installed too. If the dkms is not installed, this command will not work, but you can look into /var/lib/dkms/ directory.