> One thing I was able to determine is that it appears to be related to > Intel VT-d/VT-x or whatever Intel's IOMMU/x86 virtualisation tech > thing is called. > > I tried the card in a different older Intel i7 board and it worked > flawlessly. I then started to wonder if it was some new > incompatibility introduced with Kaby Lake. I had tweaked the UEFI > settings on the new Kaby Lake board to enable VT-d/VT-x since I wanted > to run Linux as a host OS with Windows 10 running on top of qemu/KVM. > Upon resetting the UEFI settings to their defaults (VT-d/VT-x > disabled) the card worked without issue. Nice follow up, thx. That probably explains why I never saw the issues during my testing a few weeks ago then. -- Steven Toth - Kernel Labs http://www.kernellabs.com
