Soundcard gone mute after working just fine for some time. Reinstalling didn't work.

[torreznor]

Hello everybody. I posted a message with logs and updated info here:
http://ubuntuforums.org/showthread.php?t=2223568

http://www.alsa-project.org/db/?f=6f21090aa1ff38319205d386f02a14f8161c7a78

A couple of days ago I installed Ubuntu Gnome 14.04 in my pc alongside Windows 7 and Linux Mint 15. I was really happy to see my Roland UA-55 Quad-Capture soundcard recognized and working for the first time in Ubuntu! Everything was running just fine: Youtube, mp3, videos,... I even installed Ardour and checked that the inputs of the card were usable too. Well, today I have realized that Ubuntu has gone mute. The card is still recognized in the Sound Settings menu but no sound is coming out of it. I have tried several guides I have found around but to no avail. And, what is worse and more strange, I have just reinstalled and it hasn't solved my problem. Could anyone shed some light here?

Thanks in advance for your time.

Ubuntu 14.04 LTS

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: heidi 1801 F.... pulseaudio
Date: Tue May 13 14:15:03 2014
InstallationDate: Installed on 2014-05-12 (0 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
Symptom: audio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/17/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.70
dmi.board.name: Z77 Pro4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.70:bd01/17/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ77Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[torreznor (esmuyraro)]

I used pulseaudio -k and pulseaudio -D to try to reset pulseaudio while I was writing this bug. It looks it was stopped ok but it didn't start back. The soundcard doesn't show now in Settings > Sound > Output. Instead it says Dummy Output.

[Raymond (superquad-vortex2)]

-------Mixer controls for card 1 [QUADCAPTURE]

Card hw:1 'QUADCAPTURE'/'Roland QUAD-CAPTURE at usb-0000:00:14.0-3, high speed'
  Mixer name : ''
  Components : 'USB0582:012f'
  Controls : 0
  Simple ctrls : 0

seem no volume control

post output of

lsusb -vvvv

[torreznor (esmuyraro)]

There you go. Thanks!

  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 0 (Defined at Interface level)
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 8
  idVendor 0x046d Logitech, Inc.
  idProduct 0xc018 Optical Wheel Mouse
  bcdDevice 43.01
  iManufacturer 1
  iProduct 2
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 34
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower 100mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 3 Human Interface Device
      bInterfaceSubClass 1 Boot Interface Subclass
      bInterfaceProtocol 2 Mouse
      iInterface 0
        HID Device Descriptor:
          bLength 9
          bDescriptorType 33
          bcdHID 1.11
          bCountryCode 0 Not supported
          bNumDescriptors 1
          bDescriptorType 34 Report
          wDescriptorLength 52
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0005 1x 5 bytes
        bInterval 10

Bus 003 Device 002: ID 0582:012f Roland Corp. QUAD-CAPTURE
Couldn't open device, some information will be missing
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 255 Vendor Specific Class
  bDeviceSubClass 0
  bDeviceProtocol 255
  bMaxPacketSize0 64
  idVendor 0x0582 Roland Corp.
  idProduct 0x012f QUAD-CAPTURE
  bcdDevice 1.00
  iManufacturer 1
  iProduct 2
  iSerial 3
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 511
    bNumInterfaces 5
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x80
      (Bus Powered)
    MaxPower 450mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 0
      bInterfaceClass 255 Vendor Specific Class
      bInterfaceSubClass 1
      bInterfaceProtocol 2
      iInterface 0
      ** UNRECOGNIZED: 06 24 f1 01 00 00
    Interface Descriptor:
      bLength ...

[torreznor (esmuyraro)]

Hello again. Any updates in this issue?
Thanks in advance.

[torreznor (esmuyraro)]

Reinstalled different distros several times to no avail, latest one being the most recent Linux Mint. Yesterday I booted into it and... Got sound!! First time since I posted here. Rebooted once and the card card was still alive. Sadly, when I switched on the next day there was no sound again.
The only change I can think of: after installing Mint I plugged in my AMD 5850 graphics card. The OS now sees two possible sound outputs. Any ideas?