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[Ivan Koptiev <1554077@xxxxxxxxxxxxxxxxxx>]

I'm experiencing this bug too. In my case, WiFi works in 50% of cases.
Sometimes I'm booting up and it works, sometimes It is shown as wired o_O connection instead of WiFi.

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https://bugs.launchpad.net/bugs/1554077

Title:
  brcmf_add_if: ERROR: netdev:wlp2s0 already exists

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  At boot time, on  Wifi interface set up, at boot time, an error is raised. 
  The graphical boot switches to textual boot to display this error.
  Despite this error the Wifi connection mostly works.

  [   47.250309] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
  [   47.289947] brcmf_add_if: ERROR: netdev:wlp2s0 already exists
  [   47.289950] brcmf_add_if: ignore IF event
  [   48.485330] brcmf_add_if: ERROR: netdev:wlp2s0 already exists
  [   48.485333] brcmf_add_if: ignore IF event

  Ubuntu Wily 15.10, Kernel 4.2.0-30-generic,
  Network controller: Broadcom Corporation BCM43602 802.11ac Wireless LAN SoC (rev 01)
  ---
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  gquintana   1413 F.... pulseaudio
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 15.10
  HibernationDevice: RESUME=UUID=2e069a2b-037f-4058-89b1-6e221da4046d
  InstallationDate: Installed on 2016-01-31 (35 days ago)
  InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0a5c:6410 Broadcom Corp.
   Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
   Bus 001 Device 004: ID 0c45:6713 Microdia
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 15 9550
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-30-generic.efi.signed root=UUID=3ecb2c05-ad6c-4d9d-9356-48c6991f0226 ro quiet splash nouveau.modeset=0 vt.handoff=7
  ProcVersionSignature: Ubuntu 4.2.0-30.36-generic 4.2.8-ckt3
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-30-generic N/A
   linux-backports-modules-4.2.0-30-generic  N/A
   linux-firmware                            1.149.3
  Tags:  wily
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 4.2.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo users
  _MarkForUpload: True
  dmi.bios.date: 01/25/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 01.01.19
  dmi.board.name: 0X2P13
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr01.01.19:bd01/25/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0X2P13:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 15 9550
  dmi.sys.vendor: Dell Inc.

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