Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.396074] usb 8-1: new full-speed USB device number 15 using uhci_hcd
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.627299] usb 8-1: New USB device found, idVendor=0d8c, idProduct=0102
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.627307] usb 8-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.627312] usb 8-1: Product: USB Sound Device
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.653288] current rate 30464 is different from the runtime rate 96000
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.666297] usb_audio: Warning! Unlikely big volume range (=8065), cval->res is probably wrong.
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.666305] usb_audio: [9] FU [Mic Playback Volume] ch = 2, val = -6144/1921/1usb_audio: Warning! Unlikely big volume range (=8065), cval->res is probably wrong.
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.674304] usb_audio: [11] FU [Line Playback Volume] ch = 2, val = -6144/1921/1usb_audio: Warning! Unlikely big volume range (=6928), cval->res is probably wrong.
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.698299] usb_audio: [8] FU [Mic Capture Volume] ch = 2, val = -4096/2832/1usb_audio: Warning! Unlikely big volume range (=6928), cval->res is probably wrong.
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.706307] usb_audio: [15] FU [Line Capture Volume] ch = 2, val = -4096/2832/1usb_audio: Warning! Unlikely big volume range (=6928), cval->res is probably wrong.
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.714293] usb_audio: [2] FU [PCM Capture Volume] ch = 2, val = -4096/2832/1<6>[117579.718420] input: USB Sound Device         as /devices/pci0000:00/0000:00:1d.2/usb8/8-1/8-1:1.3/input/input143
Dec  1 16:29:21 barracuda-Lenovo-G550 kernel: [117579.718711] hid-generic 0003:0D8C:0102.0008: input,hidraw0: USB HID v1.00 Device [USB Sound Device        ] on usb-0000:00:1d.2-1/input3
Dec  1 16:29:21 barracuda-Lenovo-G550 mtp-probe: checking bus 8, device 15: "/sys/devices/pci0000:00/0000:00:1d.2/usb8/8-1"
Dec  1 16:29:21 barracuda-Lenovo-G550 mtp-probe: bus: 8, device: 15 was not an MTP device
Dec  1 16:29:21 barracuda-Lenovo-G550 rtkit-daemon[1944]: Successfully made thread 12835 of process 2569 (n/a) owned by '1000' RT at priority 5.
Dec  1 16:29:21 barracuda-Lenovo-G550 rtkit-daemon[1944]: Supervising 4 threads of 1 processes of 1 users.
Dec  1 16:29:21 barracuda-Lenovo-G550 rtkit-daemon[1944]: Successfully made thread 12836 of process 2569 (n/a) owned by '1000' RT at priority 5.
Dec  1 16:29:21 barracuda-Lenovo-G550 rtkit-daemon[1944]: Supervising 5 threads of 1 processes of 1 users.