Public bug reported:
I'm seeing symptoms similar to those described in #911059 and #948235,
but I'm not sure as they're not very specific.
I'm seeing intermittent loss of connectivity, where there are no errors,
the connection stays "up" but packets are no longer getting through.
I've tried going back through the past few kernels, and the problem is
consistent from 3.2.0-19.30 through 3.2.0-23.36 (which seems to be
current). I see no errors in dmesg or other indications of what's going
wrong, but It's very easily reproducible, as it happens all the time. I
lose connectivity about once every 30 seconds, for about 30 seconds,
i.e. it's down 50% of the time.
tutti:[~] ping -I wlan0 192.168.0.1
PING 192.168.0.1 (192.168.0.1) from 192.168.0.157 wlan0: 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_req=32 ttl=64 time=2.83 ms
64 bytes from 192.168.0.1: icmp_req=33 ttl=64 time=2.85 ms
64 bytes from 192.168.0.1: icmp_req=34 ttl=64 time=2.85 ms
64 bytes from 192.168.0.1: icmp_req=35 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=36 ttl=64 time=2.80 ms
64 bytes from 192.168.0.1: icmp_req=37 ttl=64 time=2.82 ms
64 bytes from 192.168.0.1: icmp_req=38 ttl=64 time=2.99 ms
64 bytes from 192.168.0.1: icmp_req=39 ttl=64 time=3.08 ms
64 bytes from 192.168.0.1: icmp_req=40 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=41 ttl=64 time=2.75 ms
64 bytes from 192.168.0.1: icmp_req=42 ttl=64 time=3.10 ms
64 bytes from 192.168.0.1: icmp_req=43 ttl=64 time=2.93 ms
64 bytes from 192.168.0.1: icmp_req=102 ttl=64 time=2.74 ms
64 bytes from 192.168.0.1: icmp_req=103 ttl=64 time=2.75 ms
64 bytes from 192.168.0.1: icmp_req=104 ttl=64 time=2.96 ms
64 bytes from 192.168.0.1: icmp_req=105 ttl=64 time=2.85 ms
64 bytes from 192.168.0.1: icmp_req=106 ttl=64 time=2.95 ms
64 bytes from 192.168.0.1: icmp_req=107 ttl=64 time=2.97 ms
64 bytes from 192.168.0.1: icmp_req=108 ttl=64 time=2.98 ms
64 bytes from 192.168.0.1: icmp_req=109 ttl=64 time=2.79 ms
64 bytes from 192.168.0.1: icmp_req=110 ttl=64 time=2.77 ms
64 bytes from 192.168.0.1: icmp_req=111 ttl=64 time=2.89 ms
64 bytes from 192.168.0.1: icmp_req=112 ttl=64 time=3.02 ms
64 bytes from 192.168.0.1: icmp_req=113 ttl=64 time=2.95 ms
64 bytes from 192.168.0.1: icmp_req=114 ttl=64 time=3.05 ms
64 bytes from 192.168.0.1: icmp_req=115 ttl=64 time=2.91 ms
64 bytes from 192.168.0.1: icmp_req=116 ttl=64 time=2.77 ms
64 bytes from 192.168.0.1: icmp_req=117 ttl=64 time=2.77 ms
64 bytes from 192.168.0.1: icmp_req=118 ttl=64 time=3.05 ms
64 bytes from 192.168.0.1: icmp_req=119 ttl=64 time=2.95 ms
64 bytes from 192.168.0.1: icmp_req=120 ttl=64 time=1.07 ms
64 bytes from 192.168.0.1: icmp_req=121 ttl=64 time=2.76 ms
64 bytes from 192.168.0.1: icmp_req=122 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=123 ttl=64 time=3.01 ms
64 bytes from 192.168.0.1: icmp_req=124 ttl=64 time=2.88 ms
64 bytes from 192.168.0.1: icmp_req=125 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=126 ttl=64 time=3.13 ms
64 bytes from 192.168.0.1: icmp_req=127 ttl=64 time=2.75 ms
64 bytes from 192.168.0.1: icmp_req=128 ttl=64 time=2.85 ms
64 bytes from 192.168.0.1: icmp_req=129 ttl=64 time=2.97 ms
64 bytes from 192.168.0.1: icmp_req=190 ttl=64 time=2.96 ms
64 bytes from 192.168.0.1: icmp_req=191 ttl=64 time=2.87 ms
64 bytes from 192.168.0.1: icmp_req=192 ttl=64 time=2.83 ms
64 bytes from 192.168.0.1: icmp_req=193 ttl=64 time=2.95 ms
64 bytes from 192.168.0.1: icmp_req=194 ttl=64 time=2.93 ms
64 bytes from 192.168.0.1: icmp_req=195 ttl=64 time=2.86 ms
64 bytes from 192.168.0.1: icmp_req=196 ttl=64 time=2.86 ms
64 bytes from 192.168.0.1: icmp_req=197 ttl=64 time=2.82 ms
64 bytes from 192.168.0.1: icmp_req=198 ttl=64 time=2.70 ms
64 bytes from 192.168.0.1: icmp_req=199 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=200 ttl=64 time=2.85 ms
64 bytes from 192.168.0.1: icmp_req=201 ttl=64 time=2.76 ms
64 bytes from 192.168.0.1: icmp_req=202 ttl=64 time=2.85 ms
64 bytes from 192.168.0.1: icmp_req=203 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=204 ttl=64 time=2.82 ms
64 bytes from 192.168.0.1: icmp_req=205 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=206 ttl=64 time=2.83 ms
64 bytes from 192.168.0.1: icmp_req=207 ttl=64 time=3.05 ms
64 bytes from 192.168.0.1: icmp_req=208 ttl=64 time=2.87 ms
64 bytes from 192.168.0.1: icmp_req=209 ttl=64 time=2.79 ms
64 bytes from 192.168.0.1: icmp_req=210 ttl=64 time=3.11 ms
64 bytes from 192.168.0.1: icmp_req=211 ttl=64 time=2.73 ms
64 bytes from 192.168.0.1: icmp_req=212 ttl=64 time=2.76 ms
64 bytes from 192.168.0.1: icmp_req=213 ttl=64 time=2.64 ms
64 bytes from 192.168.0.1: icmp_req=214 ttl=64 time=2.78 ms
64 bytes from 192.168.0.1: icmp_req=215 ttl=64 time=2.83 ms
64 bytes from 192.168.0.1: icmp_req=216 ttl=64 time=4.17 ms
64 bytes from 192.168.0.1: icmp_req=217 ttl=64 time=2.64 ms
64 bytes from 192.168.0.1: icmp_req=218 ttl=64 time=2.86 ms
64 bytes from 192.168.0.1: icmp_req=219 ttl=64 time=2.84 ms
64 bytes from 192.168.0.1: icmp_req=220 ttl=64 time=2.89 ms
64 bytes from 192.168.0.1: icmp_req=221 ttl=64 time=2.92 ms
64 bytes from 192.168.0.1: icmp_req=222 ttl=64 time=2.86 ms
64 bytes from 192.168.0.1: icmp_req=223 ttl=64 time=2.77 ms
64 bytes from 192.168.0.1: icmp_req=224 ttl=64 time=2.90 ms
64 bytes from 192.168.0.1: icmp_req=225 ttl=64 time=2.90 ms
64 bytes from 192.168.0.1: icmp_req=226 ttl=64 time=2.68 ms
64 bytes from 192.168.0.1: icmp_req=227 ttl=64 time=2.94 ms
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-23-generic 3.2.0-23.36
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu2
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mdz 2230 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf2620000 irq 52'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:14f1506e,17aa21da,00100000
HDA:80862805,80860101,00100000'
Controls : 26
Simple ctrls : 8
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
unknown'
Mixer name : 'ThinkPad EC (unknown)'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Date: Tue Apr 17 21:06:56 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: LENOVO 4286CTO
ProcEnviron:
TERM=xterm
LC_COLLATE=C
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic
root=UUID=b4f82fbf-ca0b-4df1-86f6-2c4a94b99732 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-23-generic N/A
linux-backports-modules-3.2.0-23-generic N/A
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-03-14 (34 days ago)
dmi.bios.date: 05/31/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET47WW (1.17 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4286CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8DET47WW(1.17):bd05/31/2011:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4286CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise staging
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https://bugs.launchpad.net/bugs/984552
Title:
iwlwifi intermittently losing connectivity
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