With the amdgpu module blacklisted on the host hypervisor, I was able to successfully passthrough the GPU to a separate Ubuntu 19.10 VM, one GPU per VM. See attached screenshot. So I would say this demonstrates that the physical hardware is fine and that this is a software problem.
** Attachment added: "Screenshot of GPU passthrough to VMs" https://bugs.launchpad.net/ubuntu/+source/linux-5.4/+bug/1867455/+attachment/5336977/+files/dual-vms-screenshot.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867455 Title: Having more than one AMD Radeon RX 580 installed will trigger a PCIe bus fatal error during boot. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-5.4/+bug/1867455/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
