Comment 0 for bug 937118

Noticed this a few times on a Lenovo Thinkpad X220. It's associated with my access point but then I notice dropbox etc icons go grey. Network Manager applet still looks connected, and usual command line tools show I still have an IP address, but no packets wlil pass. Other devices (iphone, ipad, desktop PC + usb wifi adapter, other computers) are unaffected. Some devices have been connected and passing packets for many days on the same AP.

To get reconnected I can just click the network manager applet and just re-choose my AP and it re-associates and works. On this occasion I ran nm-tool to get diagnostic info and it reconnected pretty much as soon as I did that.

Access Point:-

Netgear wndr3700 running dd-wrt v24-sp2
Access Point up time 62 days
WPA2 Personal TKIP
key renewal interval 3600 seconds
Network: Mixed
Channel: 11 (2462MHz)
TX Power: 17dBm
Rate: 54Mb/s
ACK Timing: 80microseconds (2100m)
Wireless packet info:
RX: 73003327 OK,
TX: 106046844 OK, 2130 errors.

alan@deep-thought:~/Ubuntu One/network_problem$ cat ifconfig
eth0 Link encap:Ethernet HWaddr f0:de:f1:c1:7f:d9
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
          Interrupt:20 Memory:f2600000-f2620000

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:1675 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1675 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:163786 (163.7 KB) TX bytes:163786 (163.7 KB)

wlan0 Link encap:Ethernet HWaddr 74:e5:0b:a4:3c:18
          inet addr:192.168.1.122 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::76e5:bff:fea4:3c18/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:5241 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4845 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2569544 (2.5 MB) TX bytes:1308161 (1.3 MB)

alan@deep-thought:~/Ubuntu One/network_problem$ cat iwconfig
wlan0 IEEE 802.11bgn ESSID:"popey"
          Mode:Managed Frequency:2.462 GHz Access Point: E0:46:9A:4E:72:C2
          Bit Rate=54 Mb/s Tx-Power=14 dBm
          Retry long limit:7 RTS thr:off Fragment thr:off
          Power Management:off
          Link Quality=46/70 Signal level=-64 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:3305 Missed beacon:0

alan@deep-thought:~/network_problem$ ping -c 4 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 192.168.1.122 icmp_seq=1 Destination Host Unreachable
From 192.168.1.122 icmp_seq=2 Destination Host Unreachable
From 192.168.1.122 icmp_seq=3 Destination Host Unreachable
From 192.168.1.122 icmp_seq=4 Destination Host Unreachable

--- 192.168.1.1 ping statistics ---
4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3014ms
pipe 3

Module Size Used by
joydev 17693 0
parport_pc 32866 0
dm_crypt 23125 1
ppdev 17113 0
snd_hda_codec_hdmi 32474 1
snd_hda_codec_conexant 62089 1
kvm_intel 137721 0
kvm 415268 1 kvm_intel
arc4 12529 2
snd_hda_intel 33773 3
snd_hda_codec 127669 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 13668 1 snd_hda_codec
snd_pcm 97188 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
uvcvideo 72627 0
videodev 98259 1 uvcvideo
v4l2_compat_ioctl32 17128 1 videodev
btusb 18288 2
bnep 18281 2
thinkpad_acpi 81819 0
snd_seq_midi 13324 0
rfcomm 47604 10
snd_rawmidi 30748 1 snd_seq_midi
bluetooth 180104 23 btusb,bnep,rfcomm
snd_seq_midi_event 14899 1 snd_seq_midi
snd_seq 61896 2 snd_seq_midi,snd_seq_midi_event
snd_timer 29990 2 snd_pcm,snd_seq
snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
iwlwifi 328352 0
mei 41616 0
mac80211 506816 1 iwlwifi
psmouse 87603 0
serio_raw 13211 0
cfg80211 205544 2 iwlwifi,mac80211
tpm_tis 18804 0
snd 78855 17 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,thinkpad_acpi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
soundcore 15091 1 snd
nvram 14413 1 thinkpad_acpi
mac_hid 13253 0
binfmt_misc 17540 1
lp 17799 0
parport 46562 3 parport_pc,ppdev,lp
i915 468529 3
drm_kms_helper 42489 1 i915
drm 241834 4 i915,drm_kms_helper
i2c_algo_bit 13423 1 i915
sdhci_pci 18826 0
sdhci 33205 1 sdhci_pci
e1000e 156693 0
wmi 19256 0
video 19411 1 i915

Not sure what other information I can provide?

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-17-generic 3.2.0-17.26
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: alan 2132 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,00100002 HDA:80862805,80860101,00100000'
   Controls : 27
   Simple ctrls : 9
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 [on]
Date: Mon Feb 20 17:25:55 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120203)
MachineType: LENOVO 4287CTO
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic root=UUID=86ea7114-6b69-4161-b91c-44ccb7fcfd67 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-17-generic N/A
 linux-backports-modules-3.2.0-17-generic N/A
 linux-firmware 1.69
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET56WW (1.26 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4287CTO
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:bvr8DET56WW(1.26):bd12/01/2011:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4287CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO