Audio/UpgradingAlsa/DKMS - Ubuntu Wiki
https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMSsudo apt-get install dkms. Go to this page. You will find a table under the "Packages" heading. Look for the "Series" column and locate the package corresponding to your distribution series (Precise, Trusty, Xenial etc). - In case of Trusty, you will find more than one package. Then check what kernel you're running with the "uname -r" command.
UEFI/SecureBoot/DKMS - Ubuntu Wiki
https://wiki.ubuntu.com/UEFI/SecureBoot/DKMSPackages that make use of DKMS should prompt you to create a new Machine-Owner key (it will be done for you), and will guide you through the steps to enroll that key in your system's firmware. Method 2 - Disable Secure Boot in shim-signed. Open a terminal (Ctrl + Alt + T), and execute sudo mokutil --disable-validation.