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[mythsmith <786697@xxxxxxxxxxxxxxxxxx>]

Confirm: Still Reproducible on Dell Latitude E6510, Ubuntu 12.04. WiFi is not visible to mobile device.
uname -a
Linux xxx 3.2.0-58-generic #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

lspci|grep Network
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 05)
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)

dmesg near the start of ad-hoc (hotspot) mode:
[ 8433.456955] wlan0: Creating new IBSS network, BSSID 46:d7:d8:59:f3:53
[ 8433.496119] iwlwifi 0000:03:00.0: Unable to find TIM Element in beacon
[ 8433.497087] iwlwifi 0000:03:00.0: Unable to find TIM Element in beacon
[ 8444.156435] wlan0: no IPv6 routers present
[ 8474.939854] wlan0: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)
[ 8510.543150] wlan0: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)
[... ad infinitum...]

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https://bugs.launchpad.net/bugs/786697

Title:
  Unable to find TIM Element in beacon

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  here is log for ad-hoc mode. issue is  internet is not shared with
  mobile device =(.

  [79364.072970] ADDRCONF(NETDEV_UP): wlan0: link is not ready
  [79364.368716] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
  [79366.395609] wlan0: Trigger new scan to find an IBSS to join
  [79368.439576] wlan0: Trigger new scan to find an IBSS to join
  [79370.483516] wlan0: Trigger new scan to find an IBSS to join
  [79371.403299] wlan0: Creating new IBSS network, BSSID 7e:ff:17:d2:2d:0d
  [79371.403766] iwlagn 0000:04:00.0: Unable to find TIM Element in beacon
  [79371.404557] iwlagn 0000:04:00.0: Unable to find TIM Element in beacon
  [79375.211610] wlan0: no IPv6 routers present

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: linux-headers-2.6.38-8-generic 2.6.38-8.42
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  vkulikov   2030 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xd0600000 irq 45'
     Mixer name	: 'IDT 92HD75B3X5'
     Components	: 'HDA:111d7603,103c1726,00100202'
     Controls      : 20
     Simple ctrls  : 14
  Card1.Amixer.info:
   Card hw:1 'HDMI'/'HDA ATI HDMI at 0xd0510000 irq 46'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100100'
     Controls      : 4
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Sun May 22 23:05:27 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig: Error: [Errno 2] No such file or directory
  MachineType: Hewlett-Packard HP ProBook 6540b
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=f8abe165-47b3-4f3f-afe9-9fa4999a8151 ro
  RelatedPackageVersions:
   linux-restricted-modules-2.6.38-8-generic N/A
   linux-backports-modules-2.6.38-8-generic  N/A
   linux-firmware                            1.52
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UdevDb: Error: [Errno 2] No such file or directory
  UpgradeStatus: Upgraded to natty on 2011-04-28 (23 days ago)
  dmi.bios.date: 03/09/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68CDD Ver. F.0C
  dmi.board.name: 1726
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 29.36
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68CDDVer.F.0C:bd03/09/2011:svnHewlett-Packard:pnHPProBook6540b:pvr:rvnHewlett-Packard:rn1726:rvrKBCVersion29.36:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ProBook 6540b
  dmi.sys.vendor: Hewlett-Packard

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