Comment 42 for bug 1319457

Confirming the problem is not fixed in
3.13.0-46-generic #79-Ubuntu SMP Tue Mar 10 20:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

After this in the syslog
Mar 15 15:31:40 ceo1home kernel: [62288.808120] retire_capture_urb: 542 callbacks suppressed
Mar 15 15:31:45 ceo1home kernel: [62293.841065] retire_capture_urb: 527 callbacks suppressed
Mar 15 15:31:50 ceo1home kernel: [62298.868015] retire_capture_urb: 555 callbacks suppressed
Mar 15 15:31:55 ceo1home kernel: [62303.881960] retire_capture_urb: 552 callbacks suppressed
Mar 15 15:32:00 ceo1home kernel: [62308.896913] retire_capture_urb: 572 callbacks suppressed
Mar 15 15:32:05 ceo1home kernel: [62313.914858] retire_capture_urb: 563 callbacks suppressed
Mar 15 15:32:10 ceo1home kernel: [62318.919806] retire_capture_urb: 558 callbacks suppressed
Mar 15 15:32:15 ceo1home kernel: [62323.940758] retire_capture_urb: 548 callbacks suppressed
Mar 15 15:32:20 ceo1home kernel: [62328.974706] retire_capture_urb: 522 callbacks suppressed
Mar 15 15:32:25 ceo1home kernel: [62333.987654] retire_capture_urb: 576 callbacks suppressed

I unplugged the headset, then replugged it to get:

Mar 15 15:45:55 ceo1home kernel: [63144.734024] usb 2-5.2: New USB device found, idVendor=046d, idProduct=0a02
Mar 15 15:45:55 ceo1home kernel: [63144.734030] usb 2-5.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 15 15:45:55 ceo1home kernel: [63144.734034] usb 2-5.2: Product: Logitech USB Headset
Mar 15 15:45:55 ceo1home kernel: [63144.734037] usb 2-5.2: Manufacturer: Logitech
Mar 15 15:45:55 ceo1home kernel: [63144.746773] usb_audio: Warning! Unlikely big volume range (=464), cval->res is probably wrong.
Mar 15 15:45:55 ceo1home kernel: [63144.746778] usb_audio: [6] FU [Mic Playback Volume] ch = 1, val = -10496/-3072/16<6>[63144.763095] input: Logitech Logitech USB Headset as /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.2/2-5.2:1.3/input/input25
Mar 15 15:45:55 ceo1home kernel: [63144.763307] hid-generic 0003:046D:0A02.0006: input,hidraw0: USB HID v1.00 Device [Logitech Logitech USB Headset] on usb-0000:00:1d.7-5.2/input3
Mar 15 15:45:55 ceo1home mtp-probe: checking bus 2, device 9: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.2"
Mar 15 15:45:55 ceo1home mtp-probe: bus: 2, device: 9 was not an MTP device
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Successfully made thread 13980 of process 28715 (n/a) owned by '1000' RT at priority 5.
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Supervising 3 threads of 1 processes of 1 users.
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Successfully made thread 13981 of process 28715 (n/a) owned by '1000' RT at priority 5.
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Supervising 4 threads of 1 processes of 1 users.
Mar 15 15:45:58 ceo1home kernel: [63147.787367] retire_capture_urb: 528 callbacks suppressed

...
Problem recurs.

Not fixed as yet....