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[alex morris <axman.5389@xxxxxxxxx>]

Hi,

Not sure which is the key piece.  But combination of all these results
for me in video capture working predictably, with no cut-down of USB
bus.  The failure case 'lsusb -v' still coredumps, but video capture
works.

1) Run mainline kernel 3.15.0-999-generic x86_64  or newer.  
2) Do the apt-get update, upgrade.  Make sure to update libudev,  libgudev, plus vlc and its libs to newest version for trusty.
3) Firmware file needs to be corrected;  get file dvb-fe-xc5000-4.1.30.7.fw from kernellabs.  It is 16,497 bytes.
     Copy the kernellabs firmware file to                      /lib/firmware/dvb-fe-xc5000-1.6.114.fw
     Perhaps making a backup of the original..
4) make udev rule                                                            /etc/udev/rules.d/99-hauppauge.rules
SUBSYSTEM=="usb", ATTRS{iVendor}=="2040", ATTRS{iProduct}=="7200", MODE="0666"
5) Make sure vlc command is addressing the correct video and audio input devices belonging to the Hauppauge.  In my case;
     vlc -v v4l2:///dev/video0:input=1:width=720:height:480 --input-slave=alsa://hw:2,0 --sout "#blah all my transcode crap"
     
Hope this helps.

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1306712

Title:
  trusty on Intel NUC, xc5000 firmware load kills all USB

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Hello,

  Intel NUC D54250WYK, kernel 3.13.0-23-generic x86_64, Trusty 14.10,
  package linux-firmware-nonfree 1.14ubuntu1

  Installed and updated trusty 2 days ago, also updated select libs
  yesterday trying to debug this issue.  Issue seems to be with firmware
  load and the usb subsystem.   When Hauppauge 950Q inserted to usb
  port, kernel sees it and reports what appears to be normal device
  recognition.  As soon as an application tries to access the Hauppauge
  device, there are problems.  Two examples can make it fail repeatedly.

  Fail case #1) 
  With Hauppauge inserted into usb port, as root, run lsusb -v
  it aborts when trying to ennumerate the Hauppauge device.

  Bus 002 Device 004: ID 2040:7200 Hauppauge 
  lsusb: gconv.c:74: __gconv: Assertion `outbuf != ((void *)0) && *outbuf != ((void *)0)' failed.
  Aborted (core dumped)

  This failure is non-harmful as the USB bus is still active and devices
  plugged into usb still function.

  Fail case #2) 
  With Hauppauge inserted, run VLC and choose to capture the video device.

  VLC runs, kernel reports the firmware load starting, and completing.
  As soon as firmware load completes, the USB bus and all devices
  plugged in there are cut down.  Unplug and replug USB devices has no
  effect, and additional usb plug events are not seen or reported by
  kernel.  Power off to recover.

  Tried debugging a little.  The linux-firmware-nonfree package provides
  dvb-fe-xc5000-1.6.114.fw, but the kernel asks to load a newer version,
  dvb-fe-xc5000c-4.1.30.7.fw.  I got newer version from kernellabs.com
  and tried it.  Behavior is the same.

  Note- this device is known to work.  I have it working in ubuntu 11.10
  32bit, and in ubuntu 12.04 64bit.

  My kyb, mouse, and network card are all usb.  Do not have a wired
  ethernet connection to gain access (via ssh) after usb goes away..
  Will get that today but I don't know where to focus debug effort next.
  Gladly assist with additional debug.

  Attachment: output from ubuntu-bug linux with Hauppauge device mounted
  --- 
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  ajm        1479 F.... pulseaudio
   /dev/snd/controlC0:  ajm        1479 F.... pulseaudio
   /dev/snd/controlC1:  ajm        1479 F.... pulseaudio
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=3bd759c8-c3a6-478a-be0f-33979c43a52b
  InstallationDate: Installed on 2014-04-08 (2 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  IwConfig:
   usb0      no wireless extensions.
   
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-23-generic.efi.signed root=UUID=7600946f-7e95-4c85-8e0e-e056733d7a20 ro
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-23-generic N/A
   linux-backports-modules-3.13.0-23-generic  N/A
   linux-firmware                             1.127
  RfKill:
   
  Tags:  trusty
  Uname: Linux 3.13.0-23-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  WifiSyslog:
   
  _MarkForUpload: True
  dmi.bios.date: 03/03/2014
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: WYLPT10H.86A.0025.2014.0303.1008
  dmi.board.name: D54250WYK
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H13922-303
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnIntelCorp.:bvrWYLPT10H.86A.0025.2014.0303.1008:bd03/03/2014:svn:pn:pvr:rvnIntelCorporation:rnD54250WYK:rvrH13922-303:cvn:ct3:cvr:

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