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I run an Ubuntu Iso as:

#!/bin/bash MEM_SIZE=4096 qemu-system-x86_64 \ -accel kvm \ -cpu host \ -m ${MEM_SIZE} \ -M q35 \ -bios /usr/share/ovmf/OVMF.fd \ -device qemu-xhci \ -usb -device usb-host,vendorid=0x2357,productid=0x010c \ -cdrom /home/pcmagas/Λήψεις/Isos/Ubuntu/64/ubuntu-22.04.3-desktop-amd64.iso

And I try to usb-passthrough the device:

$ lsusb | grep "TP-Link" Bus 001 Device 004: ID 2357:010c TP-Link TL-WN722N v2/v3 [Realtek RTL8188EUS]

But upon my LiveCD I booted I do not see it (I have not setup the shared clipboard upon qemu yet): Ubuntu Quest VM

But I did compare using Virtualbox and works like fine:

TPLink USB device showing upon Ubuntu running in Virtualbox USB passthrough virtualbox setup

Edit 1

I did:

$ ls -l /dev/bus/usb/001/004 crw-rw-r-- 1 root root 189, 3 Ιουν 23 21:42 /dev/bus/usb/001/004 $ lsusb Bus 002 Device 002: ID 05e3:0732 Genesys Logic, Inc. All-in-One Cardreader Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 1a40:0101 Terminus Technology Inc. Hub Bus 001 Device 002: ID 4e53:5407 USB OPTICAL MOUSE Bus 001 Device 004: ID 2357:010c TP-Link TL-WN722N v2/v3 [Realtek RTL8188EUS] Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
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  • Why do you have -usb between the host controller and the passthrough'd device? Also, what's the permission of the device /dev/bus/usb/xxx/xxx (assuming you are not running qemu as root)? Commented Jun 22, 2024 at 15:18
  • @TomYan I am running as normal user. Commented Jun 23, 2024 at 18:32
  • Running as root did fix the issue. Is there a way to do it as a normal user??? Commented Jun 23, 2024 at 18:45
  • Fix the permission of the device node of the respective USB device (with chmod for a volatile change; with udev rule for a persistent change). Commented Jun 23, 2024 at 19:55
  • But Virtualbox allow me to usb passthrough withoput sudo only qemu needs sudo. Maybe it is a group issue. Commented Jun 24, 2024 at 12:11

1 Answer 1

Reset to default
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Run it using SUDO (or as a root user):

#!/bin/bash MEM_SIZE=4096 sudo qemu-system-x86_64 \ -accel kvm \ -cpu host \ -m ${MEM_SIZE} \ -M q35 \ -bios /usr/share/ovmf/OVMF.fd \ -device qemu-xhci \ -usb -device usb-host,vendorid=0x2357,productid=0x010c \ -cdrom /home/pcmagas/Λήψεις/Isos/Ubuntu/64/ubuntu-22.04.3-desktop-amd64.iso

USB device will be available upon vm.

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  • ohh my god. Thanks for answer. 1h spending with this mess :) Commented Aug 16, 2024 at 15:24

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