stubbing pci devices in unraid 6.2

Hi,

I'm using unraid 6.2 beta and have a usb 3.0 controller that i stubb so i can pass it through via gui to my vm.

I have a number of vms i use and only one of them i use for the usb passthrough.

The annoying thing for me is that to pass it through it must be stubbed. As when i am not using the vm that has the controller passthrough, i cant with other machines plug a usb device in the controller and pass that through. Before when manually editing the vm in 6.1, when i wasnt using the passthrough as it wasnt stubbed it would be available to unraid and other machines when that vm not in use.

I like the ease of being able to passthrough with the gui, but not having to stubb.

Anyway my question is - Is there another way to mark the pci device to be passed through via Gui without stubbing?

ok i wanted to release the usb 3.0 controller back to unraid so i took it out of my syslinux file.

Now it is as below

default /syslinux/menu.c32
menu title Lime Technology, Inc.
prompt 0
timeout 50
label unRAID OS
  menu default
  kernel /bzimage
  append pcie_acs_override=downstream initrd=/bzroot
label unRAID OS GUI Mode
  kernel /bzimage
   append pcie_acs_override=downstream initrd=/bzroot,/bzroot-gui
label unRAID OS Safe Mode (no plugins, no GUI)
  kernel /bzimage
  append initrd=/bzroot unraidsafemode
label Memtest86+
  kernel /memtest

But the usb controller is still listed in the VM Gui as an option to passthrough. (although not checked)

Anything i plug into the controller isnt listed in the usb devices, so obviously its still stubbed?

prime-diagnostics-20160414-1843.zip

You did reboot after you edited syslinux.cfg?

yes rebooted twice now

Just tried adding something to syslinux.cfg file so i could see a change on screen when booting up (just to see if it was loading the file correctly)

label unRAID OS Safe Mode (no plugins, no GUI) CAN I SEE THIS

Well this reboot it was fine and the pci device no longer stubbed. weird!

If you ssh to the server and do the below command you can check if the kernel module for the stubbed device is vfio-pci.

lspci -k

If you can replicate the problem, you should post it in the beta thread