I had a similar scenario occur on my Ryzen 1700 w/ Gigabyte B350 Motherboard. Nothing in the BIOS seemed to help, and updating to the latest version of the firm

I had a similar scenario occur on my Ryzen 1700 w/ Gigabyte B350 Motherboard. Nothing in the BIOS seemed to help, and updating to the latest version of the firmware didn't seem to help much. Eventually I just looked into some kernel docs decided that setting the IOMMU mode to pt during bootup might work. Specifically, I added the following to my grub config. GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=pt" Not sure if this will help any of you, but it did completely eliminate the problems I had. Shameless plug, wrote a blog about my investigations into it: https://ibiscybernetics.com/blog/2017-05-24.html https://ibiscybernetics.com/blog/2017-05-24.html