Add auto-detect and -installation routine to sound configuration

Sudden absence of a audio output device(s) after updates or misconfiguration is a quite popular error in many Ubuntu versions. The sound configuration panel in unity doesn't offer any support to automatically detect sound hardware and install necessary drivers. I'd be nice if it did including the following functions:

  - Selection of backend. There's `alsa` and `jack` and possibly more and no reason to bother Ubuntu users with that except for one page in a guided dialog.
  - Auto-detection of hardware. Although non-deterministic because of "cheap" hardware which doesn't identify itself correctly as audio hardware, there should be a page in a guided dialog allowing selection for correctly identified hardware (including eventual workarounds for detection).
  - detection of necessary drivers and support for choice if there's more than one available

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160415-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
NonfreeKernelModules: openafs
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CompizPlugins: »/apps/compiz-1/general/screen0/options/active_plugins« wurde kein Wert zugewiesen
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Tue May 17 13:29:30 2016
DistUpgraded: 2016-03-14 15:43:39,246 DEBUG enabling apt cron job
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.8, 4.4.0-22-generic, x86_64: installed
 openafs, 1.6.15, 4.4.0-22-generic, x86_64: installed
 vboxhost, 5.0.20, 4.4.0-22-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:3904]
InstallationDate: Installed on 2015-12-12 (156 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: LENOVO 20221
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-22-generic root=UUID=791b47e7-915d-4d5a-bce0-d7e9b660a2ab ro rootflags=subvol=ubuntu-main-root
SourcePackage: unity
UpgradeStatus: Upgraded to xenial on 2016-03-14 (63 days ago)
dmi.bios.date: 07/12/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 71CN51WW(V1.21)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: INVALID
dmi.board.vendor: LENOVO
dmi.board.version: 31900003WIN8 STD MLT
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad Z500 Touch
dmi.modalias: dmi:bvnLENOVO:bvr71CN51WW(V1.21):bd07/12/2013:svnLENOVO:pn20221:pvrLenovoIdeaPadZ500Touch:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadZ500Touch:
dmi.product.name: 20221
dmi.product.version: Lenovo IdeaPad Z500 Touch
dmi.sys.vendor: LENOVO
upstart.unity-panel-service-lockscreen.log:
 (unity-panel-service:31881): GLib-CRITICAL **: Source ID 4294967295 was not found when attempting to remove it

 (unity-panel-service:5623): GLib-CRITICAL **: Source ID 4294967295 was not found when attempting to remove it
version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Tue May 17 12:10:01 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 5557
 vendor CMN
xserver.version: 2:1.18.3-1ubuntu2