I just tried mainline http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.70/linux-image-4.4.70-040470-generic_4.4.70-040470.201705251131_amd64.deb and it works fine with PCI passthru Intel NVMe and HGST NVMe drives.
With the way our VM is built I do not have apport installed but I'll be happy to pull out any logs that you may need.
I just tried mainline http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.4.70/ linux-image- 4.4.70- 040470- generic_ 4.4.70- 040470. 201705251131_ amd64.deb and it works fine with PCI passthru Intel NVMe and HGST NVMe drives.
With the way our VM is built I do not have apport installed but I'll be happy to pull out any logs that you may need.