the install seams to be succesfull.

root@unibook:/home/davidak# apt install bcmwl-kernel-source
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.       
Statusinformationen werden eingelesen.... Fertig
Die folgenden NEUEN Pakete werden installiert:
0 aktualisiert, 1 neu installiert, 0 zu entfernen und 3 nicht aktualisiert.
Es müssen 1.544 kB an Archiven heruntergeladen werden.
Nach dieser Operation werden 8.059 kB Plattenplatz zusätzlich benutzt.
Holen:1 xenial-updates/restricted amd64 
bcmwl-kernel-source amd64 [1.544 kB]
Es wurden 1.544 kB in 0 s geholt (1.987 kB/s).   
Vormals nicht ausgewähltes Paket bcmwl-kernel-source wird gewählt.
(Lese Datenbank ... 266558 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von 
.../bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu1~1.1_amd64.deb ...
Entpacken von bcmwl-kernel-source ( ...
bcmwl-kernel-source ( wird eingerichtet ...
Loading new bcmwl- DKMS files...
First Installation: checking all kernels...
Building for 4.8.0-44-generic and 4.10.0-20-generic
Building for architecture x86_64
Building initial module for 4.8.0-44-generic

Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.8.0-44-generic/extra/


DKMS: install completed.
Module build for the currently running kernel was skipped since the
kernel source for this kernel does not seem to be installed.
update-initramfs: deferring update (trigger activated)
Trigger für shim-signed (1.32~16.04.1+0.9+1474479173.6c180c6-1ubuntu1) werden 
verarbeitet ...
Secure Boot not enabled on this system.
Trigger für initramfs-tools (0.122ubuntu8.8) werden verarbeitet ...
update-initramfs: Generating /boot/initrd.img-4.10.0-20-generic
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module 

but again wifi only works with kernel 4.8.0-44 bootet.

root@unibook:/home/davidak# dkms status
bcmwl,, 4.8.0-44-generic, x86_64: installed
virtualbox, 5.0.40, 4.8.0-44-generic, x86_64: installed
root@unibook:/home/davidak# uname -a
Linux unibook 4.10.0-20-generic #22-Ubuntu SMP Thu Apr 20 09:22:42 UTC 2017 
x86_64 x86_64 x86_64 GNU/Linux

Can i provide any further details that help to solve this?

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  WLan not working after Kernel update (HWE)

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Yakkety:
  Won't Fix

Bug description:
  After the update from to newer versions, wifi stopped

  The controller is still found with `lshw -class network`, but wifi is
  not displayed in Network Manager.

  Hardware is Broadcom BCM4331 802.11a/b/g/n.

  What additional informations do you need to resolve this?


  Apple MacBookPro10,2 from ~2012
  elementary OS 0.4 Loki (based on Ubuntu 16.04 LTS) with HWE-Stack
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
   /dev/snd/controlC0:  davidak    2186 F.... pulseaudio
  DistroRelease: elementary 0.4
  HibernationDevice: RESUME=UUID=f8624e3d-378a-4777-8889-1f2f01f83989
  InstallationDate: Installed on 2016-10-26 (188 days ago)
  InstallationMedia: elementary OS 0.4 "Loki" - Stable amd64 (20160909)
   ens9      no wireless extensions.
   docker0   no wireless extensions.
   lo        no wireless extensions.
  MachineType: Apple Inc. MacBookPro10,2
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-20-generic 
root=/dev/mapper/elementary--vg-root ro splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
   linux-restricted-modules-4.10.0-20-generic N/A
   linux-backports-modules-4.10.0-20-generic  N/A
   linux-firmware                             1.157.8
   0: hci0: Bluetooth
        Soft blocked: yes
        Hard blocked: no
  Tags:  loki loki
  Uname: Linux 4.10.0-20-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: docker
  _MarkForUpload: True 09/13/2015
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP102.88Z.0106.B0A.1509130955
  dmi.board.asset.tag: Base Board Asset Tag# Mac-AFD8A9D944EA4843
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro10,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-AFD8A9D944EA4843
dmi:bvnAppleInc.:bvrMBP102.88Z.0106.B0A.1509130955:bd09/13/2015:svnAppleInc.:pnMacBookPro10,2:pvr1.0:rvnAppleInc.:rnMac-AFD8A9D944EA4843:rvrMacBookPro10,2:cvnAppleInc.:ct10:cvrMac-AFD8A9D944EA4843: MacBookPro10,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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