Mic Mute LED does not work on Dell latitude 3150

This problem was already fixed in the upstream. we need to back port the fix to linux-utopic

The fix commit id in the upstream are:

4a83d42ae2041d5b76f1a0662bc3a5a85e4eb0d1
6676f3081f7e3dae64e05b87d47a041b782f898a

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1418832

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

and one more commit 00ef99408b6cc8d86ca614ada8025aa3606860db

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-utopic' to 'verification-done-utopic'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

This bug was fixed in the package linux - 3.16.0-31.41

---------------
linux (3.16.0-31.41) utopic; urgency=low

  [ Seth Forshee ]

  * Release Tracking Bug
    - LP: #1419961

  [ Andy Whitcroft ]

  * [Debian] arm64 -- build ubuntu drivers
    - LP: #1411284
  * hyper-v -- fix comment handing in /etc/network/interfaces
    - LP: #1413020

  [ Ben Hutchings ]

  * SAUCE: rtsx_usb_ms: Use msleep_interruptible() in polling loop
    - LP: #1413149

  [ Brad Figg ]

  * SAUCE: Config IWLWIFI_UAPSD=N

  [ Kamal Mostafa ]

  * [Packaging] force "dpkg-source -I -i" behavior

  [ Kukjin Kim ]

  * SAUCE: (no-up) ARM: SAMSUNG: fix the CPU_ID for EXYNOS5440
    - LP: #1411062

  [ Leann Ogasawara ]

  * ubuntu: AUFS -- Resolve build failure union has no member named
    'd_child'

  [ Ming Lei ]

  * SAUCE: (no-up) ARM: EXYNOS: fix booting oops on exynos5440
    - LP: #1411062
  * SAUCE: (no-up) ARM: exynos5440-sd5v1: switch to fixed-link DT binding
    - LP: #1417339
  * SAUCE: (no-up) net: stmmac: add fixed_phy support via fixed-link DT
    binding
    - LP: #1417339

  [ Upstream Kernel Changes ]

  * Revert "[SCSI] mpt2sas: Remove phys on topology change."
    - LP: #1419125
  * Revert "[SCSI] mpt3sas: Remove phys on topology change"
    - LP: #1419125
  * Revert "ARM: 7830/1: delay: don't bother reporting bogomips in
    /proc/cpuinfo"
    - LP: #1419125
  * powerpc/powernv: Don't call generic code on offline cpus
    - LP: #1400411
  * powerpc/powernv: Return to cpu offline loop when finished in KVM guest
    - LP: #1400411
  * powerpc/powernv: Switch off MMU before entering nap/sleep/rvwinkle mode
    - LP: #1400411
  * powerpc/powernv: Enable Offline CPUs to enter deep idle states
    - LP: #1400411
  * powernv/cpuidle: Redesign idle states management
    - LP: #1400411
  * powernv/powerpc: Add winkle support for offline cpus
    - LP: #1400411
  * powerpc/kdump: Ignore failure in enabling big endian exception during
    crash
    - LP: #1410817
  * powerpc/perf/hv-24x7: Use kmem_cache_free
    - LP: #1410519
  * powerpc/perf/hv-24x7: use kmem_cache instead of aligned stack
    allocations
    - LP: #1410519
  * powerpc/perf/hv-24x7: Use per-cpu page buffer
    - LP: #1410519
  * power/perf/hv-24x7: Use kmem_cache_free() instead of kfree
    - LP: #1410519
  * KVM: x86: SYSENTER emulation is broken
    - LP: #1414651
    - CVE-2015-0239
  * powerpc/xmon: Fix another endiannes issue in RTAS call from xmon
    - LP: #1415919
  * HID: i2c-hid: call the hid driver's suspend and resume callbacks
    - LP: #1417363
  * HID: i2c-hid: Do not free buffers in i2c_hid_stop()
    - LP: #1417363
  * ALSA: hda - add mic mute led hook for dell machines
    - LP: #1418832
  * ALSA: hda - move DELL_WMI_MIC_MUTE_LED to the tail in the quirk chain
    - LP: #1381856, #1418832
  * ALSA: hda - fix the mic mute led problem for Latitude E5550
    - LP: #1381856, #1418832
  * drm/i915: don't warn if backlight unexpectedly enabled
    - LP: #1419125
  * drm/i915/dp: only use training pattern 3 on platforms that support it
    - LP: #1419125
  * udptunnel: Add SKB_GSO_UDP_TUNNEL during gro_complete.
    - LP: #1419125
  * s390/3215: fix hanging console issue
    - LP...