The linux firmware has been updated and the usbduxsigma firmware as
well. However it's still the _old_ firmware.

See the diff between the kernel git and what ubuntu has:
bp1@bp1-Precision-WorkStation-T5400:/tmp/linux-firmware$ diff 
usbduxsigma_firmware.bin /lib/firmware/usbduxsigma_firmware.bin 
Binary files usbduxsigma_firmware.bin and 
/lib/firmware/usbduxsigma_firmware.bin differ

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  usbduxsigma_firmware.bin: old version causes driver crash

Status in linux-firmware package in Ubuntu:

Bug description:
  The firmware of the usbduxsigma (alongside with the usbduxsigma.c) was
  updated in 2015 during a major rewrite but its binary was still the
  old one which causes the kernel driver to fail.

  I've submitted a patch to the kernel people (see below).

  However, as a quick fix could you also apply the patch to the package
  directly to have this fixed now and then we can wait until it trickles
  down from the kernel.

  I'm the maintainer of both the firmware and the drivers.

  This affects both 32 and 64 bit distros.

  /Bernd Porr (

  Description:  Ubuntu 16.04.1 LTS
  Release:      16.04

    Installed: 1.157.2
    Candidate: 1.157.2
    Version table:
   *** 1.157.2 500
          500 xenial-updates/main amd64 
          500 xenial-updates/main i386 
          100 /var/lib/dpkg/status
       1.157 500
          500 xenial/main amd64 Packages
          500 xenial/main i386 Packages

  Expect to happen: plug in a duxduxsigma device, start comedirecord and see 
the signals plotted
  Happens instead: plug in a duxduxsigma device, start comedirecord and GARBLED 
DATA shows up / crash
  Fix: install this patch (new version of the firmware binary)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-firmware 1.157.2 [modified: 
  ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
  Uname: Linux 4.4.0-31-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jul 24 10:04:19 2016
  InstallationDate: Installed on 2013-12-09 (957 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131209)
  PackageArchitecture: all
  SourcePackage: linux-firmware
  UpgradeStatus: Upgraded to xenial on 2016-07-23 (0 days ago)

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