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Same for me on DELL inspirion 15 i7 5500U

Intel Wireless 3160 (Rev. 83)

Tested with live image  53c869eba8686007239a650d903847fd ubuntu-15.04
-desktop-amd64.iso

Ubuntu 14.04 live works

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https://bugs.launchpad.net/bugs/1453701

Title:
  Wifi authentication times out immediately

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After upgrading to Ubuntu 15.04, wifi connections fail (not sure about the router configuration that causes connections to fail).
  Seems like regression from 14.10 (my wifi tethering from my Android used to work, but now it doesn't).
  I have a Lenovo Y50, chipset Intel 3160.

  nitz@ship:~$ modinfo iwlwifi | grep 3160
  firmware:       iwlwifi-3160-10.ucode

  Tried using versions 12 / 7 of the driver as suggested here
  (http://askubuntu.com/questions/611222/cannot-connect-to-wifi-intel-
  corporation-wireless-3160), no avail.

  From syslog when trying to connect with netowrk-manager:

  May 11 09:36:51 ship kernel: [ 2463.891571] wlan0: send auth to 02:1a:11:f3:7a:ac (try 1/3)
  May 11 09:36:51 ship kernel: [ 2463.952544] wlan0: send auth to 02:1a:11:f3:7a:ac (try 2/3)
  May 11 09:36:52 ship kernel: [ 2464.026345] wlan0: send auth to 02:1a:11:f3:7a:ac (try 3/3)
  May 11 09:36:52 ship kernel: [ 2464.122796] wlan0: authentication with 02:1a:11:f3:7a:ac timed out

  when running wpa_supplicant with debug (-dd):
  wlan0: State: SCANNING -> AUTHENTICATING
  EAPOL: External notification - EAP success=0
  EAPOL: External notification - EAP fail=0
  EAPOL: External notification - portControl=Auto
  nl80211: Authenticate (ifindex=4)
    * bssid=02:1a:11:f3:7a:ac
    * freq=2437
    * SSID - hexdump_ascii(len=7):
       56 69 72 75 73 41 50                              VirusAP
    * IEs - hexdump(len=0): [NULL]
    * Auth Type 0
  nl80211: Authentication request send successfully
  nl80211: Drv Event 19 (NL80211_CMD_NEW_STATION) received for wlan0
  nl80211: New station 02:1a:11:f3:7a:ac
  nl80211: Drv Event 20 (NL80211_CMD_DEL_STATION) received for wlan0
  nl80211: Delete station 02:1a:11:f3:7a:ac
  nl80211: Drv Event 37 (NL80211_CMD_AUTHENTICATE) received for wlan0
  nl80211: MLME event 37; timeout with 02:1a:11:f3:7a:ac
  wlan0: Event AUTH_TIMED_OUT (14) received
  wlan0: SME: Authentication timed out

  ---
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     2117 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     2117 F.... pulseaudio
  CasperVersion: 1.360
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.04
  LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: LENOVO 20378
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash ---
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  Tags:  vivid
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 02/11/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9ECN37WW(V2.01)
  dmi.board.asset.tag: 31900058WIN
  dmi.board.name: Lenovo Y50-70
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058WIN
  dmi.chassis.asset.tag: 31900058WIN
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Y50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9ECN37WW(V2.01):bd02/11/2015:svnLENOVO:pn20378:pvrLenovoY50-70:rvnLENOVO:rnLenovoY50-70:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoY50-70:
  dmi.product.name: 20378
  dmi.product.version: Lenovo Y50-70
  dmi.sys.vendor: LENOVO

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