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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