Nut Server LXC USB Passthrough


New Member
Oct 25, 2023
Hi Community,
I could use some help, I installed NUT-CLIENT, NUT-SERVER, NUT In a unprivileged LXC and then passed the USB to NUT. I am having issues getting the driver to work and I think the issue is due to LXC

This is the USB device I am trying to pass
crw-rw-r-- 1 root root 189, 257 Oct 24 03:46 /dev/bus/usb/003/002 (USB Port on a Tripplite 4U UPS)

this is in my LXC config
lxc.cgroup.devices.allow: c 189:* rwm
lxc.mount.entry: /dev/bus/usb/003/002 dev/bus/usb/003/002 none bind,optional,create=file

Inside my NUT LXC
root@NUT:~# nut-scanner -U
SNMP library not found. SNMP search disabled.
Neon library not found. XML search disabled.
IPMI library not found. IPMI search disabled.
Scanning USB bus.
driver = "usbhid-ups"
port = "auto"
vendorid = "09AE"
productid = "3014"
bus = "003"

when I run upsdrvctl start
Output is
Network UPS Tools - UPS driver controller 2.7.4
Network UPS Tools - Generic HID driver 0.41 (2.7.4)
USB communication driver 0.33
Can't claim USB device [09ae:3014]: could not detach kernel driver from interface 0: Operation not permitted
Driver failed to start (exit status=1)

I think NUT needs Root or this file needs permissions changed.
root@NUT:~# ls -al /dev/bus/usb/003/002
crw-rw-r-- 1 nobody nogroup 189, 257 Oct 24 07:46 /dev/bus/usb/003/002

any help much appreciated Really enjoying Proxmox been a Hyper-V person.

after reading more this a issue with the Guest not able to read / write permissions to the usb device.

Last edited:
Can't claim USB device [09ae:3014]: could not detach kernel driver from interface 0: Operation not permitted
This is not possible from the guest. Try to find out what driver it is and manually unload it on your PVE host.

Maybe just go with a QEMU/KVM VM and passthrough the device directly.


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