Ubuntu 19.10 - Issues with USB 2.0

Question

Issue:

I want to use my USB 2.0 ports in Ubuntu 19.10, but they do not seem to work.

What I have already tried:

• Unplugging and plugging the peripherals (and USB drives) back in - Did not help.
• Putting the peripherals on USB 3.0 - Works, but I still want to be able to use my USB 2.0 ports
• Doing apt dist-upgrade - Did not help.

Environment:

• CPU - AMD FX-8350
• MOTHERBOARD - Gigabyte 970A-UD3 (AM3/AM3+) with BIOS version FC

Please,assist me.

Answer 1

The issue was IOMMU. By default it is set to DISABLED. It needs to be set to ENABLED.