USB 3.0 not working on MSI 970 gaming motherboard (fixed)

Out of the box the USB 3.0 may not work at all on MSI 970. I searched far and wide, until I found someone using same motherboard on linuxmint distro with same problem. They had a fix but it had a con, however since I did it there were no issues whatsoever so this fix works even better than I thought.

  • from a terminal session enter the following commands: sudo gedit /etc/default/grub
  • change the line GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="iommu=soft"
  • save this changed file and EXIT the terminal session.
  • start another terminal session and enter the following command:
  • sudo update-grub
  • EXIT this terminal session and reboot

Source: MSI 970 Gaming USB 3.0 connector not working correctly - Linux Mint Forums


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