Tested new security patches on 8.2.

Network performance seems just fine. Have 4 Windows server 2019 and 2 Fedora Server VMs recording video feed. Haven't observed any difference in performance.

Supermicro SYS-1029U-TR4 with 768gig ram.
Network usage: about 400mbps constant.
ZFS

I have a fully updated xcp 8.2 running with 2 nvidia quadro rtx 6000s.

GPU passthrough works as expected.
GPU PCI passthrough works as expected.
USB PCI passthrough of an ASMedia controller works as expected

However I cannot combine GPU and USB pci passthrough. Starting the vm just hangs. I see no errors, nothing of note in xl dmesg.

I have done this before with KVM on Fedora linux, on the same machine. So I know its not the hardware or bios.

Is there some underlying reason why USB and GPU PCI Passthrough together will not work?