How do I install my USB video adapter in Ubuntu 15.0 (kernel 3.16)?

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:

1. On your desktop, click the Ubuntu icon, type terminal, and then press Enter.
2. Type sudo apt-get install dkms, and then press Enter.

When the DKMS package is installed, complete the following:

1. Download the latest drivers from the StarTech.com website (www.startech.com/Support). You can find the part number and product ID on the product packaging.

Note: Ubuntu typically saves files to the Downloads folder that is associated with your user account (for example, ~/Downloads).

2. When the download is complete, open the zip folder that you downloaded and click and drag the Ubuntu folder to your desktop.
3. Click the Ubuntu icon, type terminal, and then press Enter.
4. Type cd ~/Desktop/Ubuntu, and then press Enter.
5. Type chmod 755 displaylink-driver.run, and then press Enter.
6. Type sudo ./displaylink-driver.run, and then press Enter.
7. When the driver package finishes installing, restart your computer. To restart your computer from the terminal window, type sudo reboot, and then press Enter.
8. When Ubuntu finishes restarting, connect the USB video adapter to your computer.

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.