Sys-usb failed to start

User Support
1

Sys-usb can’t start and I don’t know why. When I try to start it I get this message:
“Start failed: internal error: Unable to reset PCI device 0000:00:14.0: no FLR, PM reset or bus reset available”.

I would appreciate any help to solve my problem.

Thank you!

2

Hello.

Go to sys-usb Qube Settings, select Devices and click Configure strict reset for PCI Devices.

And don’t forget to read the docs regarding security implications of you actions ( if it works for o
you)

https://www.qubes-os.org/doc/pci-devices/

Then start sys-usb or reboot your machine.

Regards

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3

Read the docs? This is actually a FAQ -

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4

I have the same problem on both 4.0.3 and 4.0.4-rc1 on HP EliteBook 8470p. There is no setting in BIOS to disable USB3. Suggested info on https://www.qubes-os.org/doc/usb-troubleshooting/ does not help neither does FAQs.

2021-01-01 17:13:41.617+0000: libxl: libxl_pci.c:1016:qemu_pci_add_xenstore: qemu refused to add device: 0000:00:14.0,msitranslate=0,power_mgmt=0
2021-01-01 17:13:41.618+0000: libxl: libxl_pci.c:1364:libxl__add_pcidevs: libxl_device_pci_add failed: -3
2021-01-01 17:13:41.618+0000: libxl: libxl_create.c:1517:domcreate_attach_devices: unable to add pci devices
2021-01-01 17:13:42.028+0000: libxl: libxl_pci.c:1202:libxl__device_pci_reset: The kernel doesn't support reset from sysfs for PCI device 0000:00:14.0
2021-01-01 17:13:42.732+0000: libxl: libxl_device.c:1093:device_backend_callback: unable to remove device with path /local/domain/3/backend/vif/10/0
2021-01-01 17:13:42.756+0000: libxl: libxl.c:1669:devices_destroy_cb: libxl__devices_destroy failed for 10
2021-01-01 17:13:42.980+0000: libxl: libxl_device.c:1093:device_backend_callback: unable to remove device with path /local/domain/3/backend/vif/9/0
2021-01-01 17:13:43.000+0000: libxl: libxl.c:1669:devices_destroy_cb: libxl__devices_destroy failed for 9

Switching to PV didn’t help but removing controller 00:14.0 from sys-usb devices helped.
I also found this useful:

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