voila ce que donne la commande quand je branche l'usb wifi
sudo journalctl -f
avril 20 14:59:05 localhost.localdomain kernel: usb 1-2.3: new high-speed USB device number 19 using xhci_hcd
avril 20 14:59:05 localhost.localdomain kernel: usb 1-2.3: New USB device found, idVendor=0bda, idProduct=b812, bcdDevice= 2.10
avril 20 14:59:05 localhost.localdomain kernel: usb 1-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
avril 20 14:59:05 localhost.localdomain kernel: usb 1-2.3: Product: 802.11ac NIC
avril 20 14:59:05 localhost.localdomain kernel: usb 1-2.3: Manufacturer: Realtek
avril 20 14:59:05 localhost.localdomain kernel: usb 1-2.3: SerialNumber: 123456
avril 20 14:59:05 localhost.localdomain mtp-probe[36569]: checking bus 1, device 19: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.3"
avril 20 14:59:05 localhost.localdomain mtp-probe[36569]: bus: 1, device: 19 was not an MTP device
avril 20 14:59:05 localhost.localdomain mtp-probe[36572]: checking bus 1, device 19: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.3"
avril 20 14:59:05 localhost.localdomain mtp-probe[36572]: bus: 1, device: 19 was not an MTP device
avril 20 14:59:05 localhost.localdomain systemd[1]: fprintd.service: Succeeded.
avril 20 14:59:05 localhost.localdomain audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=fprintd comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'