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[Seth Forshee <seth.forshee+lp@xxxxxxxxxxxxx>]

It looks like the disconnections are initiated by NetworkManager, which
gives the reason 'ip-config-unavailable'. Maybe some kind of dhcp
problem, I'm not sure. Right now it isn't looking like a driver problem
but something higher in the stack, so I'm updating the bug to affect
network manager so that someone more familiar with that level of the
network stack can take a look.

** Package changed: linux (Ubuntu) => network-manager (Ubuntu)

** Changed in: network-manager (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1355441

Title:
  Wifi dropping

Status in “network-manager” package in Ubuntu:
  Confirmed

Bug description:
  Environment

  Lenovo T440s
  Ubuntu 14.04
  Kernel: 3.13.0-32-generic #57-Ubuntu SMP  x86_64
  Firmware version: Aug 11 14:17:58 dave kernel: [    3.336421] iwlwifi 0000:03:00.0: loaded firmware version 22.1.7.0 op_mode iwlmvm
  # I have also tried version 22.1.8.0
  sudo lshw -C network
         description: Wireless interface
         product: Wireless 7260
         vendor: Intel Corporation
         physical id: 0
         bus info: pci@0000:03:00.0
         logical name: wlan0
         version: 83
         serial: e8:2a:ea:b3:5a:1f
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
         configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-32-generic firmware=22.1.7.0 ip=192.168.1.121 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
         resources: irq:61 memory:f0400000-f0401fff
  sudo iwconfig:
    wlan0     IEEE 802.11abgn  ESSID:"nfu2"  
            Mode:Managed  Frequency:2.437 GHz  Access Point: 68:7F:74:A2:56:27   
            Bit Rate=54 Mb/s   Tx-Power=16 dBm   
            Retry  long limit:7   RTS thr:off   Fragment thr:off
            Encryption key:off
            Power Management:off
            Link Quality=70/70  Signal level=-22 dBm  
            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
            Tx excessive retries:0  Invalid misc:119   Missed beacon:0
  grep wifi /var/log/syslog:
    Aug 11 14:17:58 dave kernel: [    3.336421] iwlwifi 0000:03:00.0: loaded firmware version 22.1.7.0 op_mode iwlmvm
    (30x of these:) Aug 11 16:52:15 dave kernel: [ 9256.926634] iwlwifi 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  dave       1907 F.... pulseaudio
   /dev/snd/controlC0:  dave       1907 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Aug 11 16:46:39 2014
  HibernationDevice: RESUME=UUID=b447ca85-41cc-44f1-b4b4-8a44bf215053
  InstallationDate: Installed on 2014-07-21 (21 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20AQCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic.efi.signed root=UUID=a5f87e7d-a068-4cf1-94c5-0a4d068328f4 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/20/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET77WW (2.27 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50512 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET77WW(2.27):bd05/20/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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