dmesg | tail && lsusb && lsusb -t




[ 3347.888156] usb 1-1: new high-speed USB device number 4 using ehci-pci
[ 3348.023740] usb 1-1: New USB device found, idVendor=1b80, idProduct=e395
[ 3348.023754] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3348.023758] usb 1-1: Product: DVB-T 2
[ 3348.023762] usb 1-1: Manufacturer: Afatech
[ 3348.027852] usb 1-1: dvb_usb_v2: found a 'KWorld USB DVB-T TV Stick II (VS-DVB-T 395U)' in cold state
[ 3348.068858] usb 1-1: Direct firmware load failed with error -2
[ 3348.068867] usb 1-1: Falling back to user helper
[ 3348.074314] usb 1-1: dvb_usb_v2: Did not find the firmware file 'dvb-usb-af9015.fw'. Please see linux/Documentation/dvb/ for more details on firmware-problems. Status -2
[ 3348.074339] dvb_usb_af9015: probe of 1-1:1.0 failed with error -2
Bus 001 Device 004: ID 1b80:e395 Afatech 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M
    |__ Port 1: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M