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I try to run a Windows 10 VM with GPU passthru, that works fine but my gamepad , actualy a Betaflight flight controller running in HID mode, is resetted all the time.

The controller works on the host system (Ubuntu 18). Kernel version: Linux sil 4.18.0-16-generic #17~18.04.1-Ubuntu SMP Tue Feb 12 13:35:51 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

dmesg after plugging it in: [ 5236.675786] usb 3-1: new full-speed USB device number 23 using xhci_hcd [ 5236.828939] usb 3-1: New USB device found, idVendor=0483, idProduct=3256, bcdDevice= 2.00 [ 5236.828943] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 5236.828945] usb 3-1: Product: MatekF411 [ 5236.828947] usb 3-1: Manufacturer: Betaflight [ 5236.828949] usb 3-1: SerialNumber: 0x8000000 [ 5236.831498] input: Betaflight MatekF411 as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.0/0003:0483:3256.0020/input/input59 [ 5236.831704] hid-generic 0003:0483:3256.0020: input,hidraw2: USB HID v1.11 Gamepad [Betaflight MatekF411] on usb-0000:00:14.0-1/input0 [ 5236.831928] cdc_acm 3-1:1.1: ttyACM0: USB ACM device

dmesg after VM is started: [ 5286.246448] audit: type=1400 audit(1552424464.131:129): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libvirt-78575cdf-adbb-4437-8a18-a4615f5575a0" pid=10341 comm="apparmor_parser" [ 5286.750741] audit: type=1400 audit(1552424464.635:130): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-78575cdf-adbb-4437-8a18-a4615f5575a0" pid=10357 comm="apparmor_parser" [ 5286.924865] audit: type=1400 audit(1552424464.811:131): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-78575cdf-adbb-4437-8a18-a4615f5575a0" pid=10360 comm="apparmor_parser" [ 5287.098850] audit: type=1400 audit(1552424464.983:132): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="libvirt-78575cdf-adbb-4437-8a18-a4615f5575a0" pid=10363 comm="apparmor_parser" [ 5287.102253] virbr0: port 2(vnet0) entered blocking state [ 5287.102255] virbr0: port 2(vnet0) entered disabled state [ 5287.102294] device vnet0 entered promiscuous mode [ 5287.102439] virbr0: port 2(vnet0) entered blocking state [ 5287.102440] virbr0: port 2(vnet0) entered listening state [ 5287.278592] audit: type=1400 audit(1552424465.163:133): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-78575cdf-adbb-4437-8a18-a4615f5575a0" pid=10389 comm="apparmor_parser" [ 5287.912886] vfio_ecap_init: 0000:01:00.0 hiding ecap 0x1e@0x258 [ 5287.912897] vfio_ecap_init: 0000:01:00.0 hiding ecap 0x19@0x900 [ 5289.120700] virbr0: port 2(vnet0) entered learning state [ 5289.249049] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5289.524998] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5291.136692] virbr0: port 2(vnet0) entered forwarding state [ 5291.136699] virbr0: topology change detected, propagating [ 5296.117002] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5296.512972] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5297.641034] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5297.941119] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5298.241075] usb 3-1: reset full-speed USB device number 23 using xhci_hcd [ 5298.517109] usb 3-1: reset full-speed USB device number 23 using xhci_hcd

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