VM USB Passthrough unplug and replug not working

[OverEngineer]

Hey, i am using usb device passthrough to a vm with controller-type qemu-xhci, today i tried unplugging and replugging the usb and it was not passed into the VM on replug, is this expected behavior?
Can this somehow be done?

 

[tprelog]

Hey, i am using usb device passthrough to a vm with controller-type qemu-xhci, today i tried unplugging and replugging the usb and it was not passed into the VM on replug, is this expected behavior?
Can this somehow be done?

I don't think TrueNAS VMs support hot plugging USB.

FWIW, I hit a similar issue running Home Assistant OS, where one of the add-ons resets a connected USB device. This causes the device to eject from the VM and never reattach unless I restart the VM.

I think a workaround is to use PCIe passthrough for the entire USB controller that your device is connected to.

 

[OverEngineer]

I don't think TrueNAS VMs support hot plugging USB.

FWIW, I hit a similar issue running Home Assistant OS, where one of the add-ons resets a connected USB device. This causes the device to eject from the VM and never reattach unless I restart the VM.

I think a workaround is to use PCIe passthrough for the entire USB controller that your device is connected to.

Thanks for your answer, sadly i cannot do PCI passthhrough atm.

Imho is this behavior just wrong, USBs are sort-of hot pluggable devices and usb passthrough should just work correctly on replugging.

I hope someone else can answer/solve this problem. I hope there is a way to get this to work correctly, eventually with another controller-type..

 

[elvisimprsntr]

+1 Proxmox supports USB device passthru

TrueNAS is a NAS appliance first.
Proxmox is a type 1 hypervisor first.

 

[OverEngineer]

+1 Proxmox supports USB device passthru

TrueNAS is a NAS appliance first.
Proxmox is a type 1 hypervisor first.

What do you want to say with this? Truenas also supports USB device pasthrough but the un and replugging does now work

 

[Ericloewe]

Imho is this behavior just wrong, USBs are sort-of hot pluggable devices and usb passthrough should just work correctly on replugging.

That's precisely what makes USB difficult for this use case. There's just no great general solution and too many ways to make this break in weird and wonderful ways.

 

[OverEngineer]

That's precisely what makes USB difficult for this use case. There's just no great general solution and too many ways to make this break in weird and wonderful ways.

Should i create a bug somewhere because imho this is clearly a bug.

 

[Ericloewe]

You can try, but it's not likely to get traction between the high complexity and low return of the work involved...