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    USB Passthrough Seen as Root Hub in VM

    Scheduled Pinned Locked Moved Compute
    16 Posts 5 Posters 1.0k Views
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    • K
      krakers @infodavid
      last edited by

      @infodavid I don't think I managed to make it working for me. It's been 4 years and after ups and downs with using USB in VM I decided to let it go and no longer attach USB devices to VMs.

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        infodavid @krakers
        last edited by

        @krakers Thanks for your answer. The behavior is very strange, the device is attached on start of the vm but status changed to 'not attached' after boot of the vm, few seconds later.

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        • U
          uwood
          last edited by

          I use VirtualHere on a Raspberry Pi as a workaround.

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            infodavid @uwood
            last edited by

            @uwood Smart workaround. Unfortunately you have to pay for VirtualHere and use another system to connect the device. It will be nice to have the USB devices working on the hypervisor.

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              manilx @uwood
              last edited by

              @uwood I also switched to use this. I had nothing but trouble with USB passthrough. While initially working all hell broke loose when I detached a host from the pool, with the USB device appearing multiple times in GUI and CLI..... had to reinstall both hosts and pool from scratch.

              Xen is just not made for this!

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                infodavid @manilx
                last edited by

                @manilx did you try to install the server part on the hypervisor? Is there a free plan for the software?

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                  manilx @infodavid
                  last edited by

                  @infodavid I had a dedicated VM with passtrough on xcpng serving other VM's.
                  BUT: you can't snapshot a VM with passthrough, so you cannot backup if it is running. I also found that you can't migrate it.
                  It's just NOT worth the trouble. Install the server somewehere else. You can use it free for up to 3 USB connections (I think. Just check the website).

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                    infodavid @manilx
                    last edited by

                    @manilx so, solutions are:

                    • use a client / server solution perhaps on another system,
                    • Install some software directly on the hypervisor.
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                      manilx @infodavid
                      last edited by

                      @infodavid Install VirtualHere server on another PC/Pie. I have it on a proxmox VM (proxmox has no issues with passthrough).

                      Install VirtualHere clients on the VM's in xcpng that need the USB devices.

                      Sleep well and backup/snapshot/migrate at will 🙂

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                        infodavid @manilx
                        last edited by

                        @manilx 0k. The device is an ups so I'll try first to install a server software on the hypervisor. I'm not very enthusiastic about adding another system just to plug that ups.

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                          infodavid @infodavid
                          last edited by

                          Finally, I follow an existing topic and configure nut-server on the hypervisor to access the ups via usb.
                          I know that Olivier is not fully aligned with the fact that the host is modified but IMO it is an acceptable change on my XCP-NG host.

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