To install your USB video adapter in Ubuntu 15.0 (kernel 3.16), you need to download the Dynamic Kernel Module Support (DKMS) package and the adapter driver.
To install the DKMS package, complete the following:
When the DKMS package is installed, complete the following:
Note: Ubuntu typically saves files to the Downloads folder that is associated with your user account (for example, ~/Downloads).
Note: It can take several minutes to complete the installation. During this time, your display might flicker, but this is normal behavior. When the installation is complete, your Ubuntu desktop is extended to the additional monitor.