12.10: Wifi is unstable, disconnect once a minute

[Torstein Bø]

Once every minute the wifi disconnect and then reconnect. I have tried different networks, all with the same results.

Here is some of the output from dmesg:

[ 1131.645672] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1139.322167] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1143.518989] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1152.629460] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1159.385516] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1162.334816] wlan0: deauthenticating from 00:21:29:c6:64:82 by local choice (reason=3)
[ 1162.371668] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 1162.371682] cfg80211: Restoring regulatory settings
[ 1162.371695] cfg80211: Calling CRDA to update world regulatory domain
[ 1162.380448] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 1162.380457] cfg80211: World regulatory domain updated:
[ 1162.380461] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1162.380468] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1162.380474] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1162.380479] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1162.380484] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1162.380489] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1168.364776] wlan0: authenticate with 00:21:29:c6:64:82
[ 1168.371440] wlan0: send auth to 00:21:29:c6:64:82 (try 1/3)
[ 1168.374398] wlan0: authenticated
[ 1168.377634] wlan0: associate with 00:21:29:c6:64:82 (try 1/3)
[ 1168.381704] wlan0: RX AssocResp from 00:21:29:c6:64:82 (capab=0x411 status=0 aid=7)
[ 1168.381707] wlan0: associated
[ 1180.370191] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1188.457094] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1195.110835] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1200.229042] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1205.859130] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1215.788450] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1222.339402] wlan0: deauthenticating from 00:21:29:c6:64:82 by local choice (reason=3)
[ 1222.362122] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 1222.362138] cfg80211: Restoring regulatory settings
[ 1222.362150] cfg80211: Calling CRDA to update world regulatory domain
[ 1222.368767] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 1222.368771] cfg80211: World regulatory domain updated:
[ 1222.368772] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1222.368775] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1222.368777] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1222.368779] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1222.368781] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1222.368783] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1228.349116] wlan0: authenticate with 00:21:29:c6:64:82
[ 1228.353431] wlan0: send auth to 00:21:29:c6:64:82 (try 1/3)
[ 1228.356477] wlan0: authenticated
[ 1228.359911] wlan0: associate with 00:21:29:c6:64:82 (try 1/3)
[ 1228.364234] wlan0: RX AssocResp from 00:21:29:c6:64:82 (capab=0x411 status=0 aid=7)
[ 1228.364243] wlan0: associated
[ 1232.474032] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1240.560662] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1248.648051] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1253.868127] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1259.088798] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1262.466777] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1268.813498] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1275.159997] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1282.349072] wlan0: deauthenticating from 00:21:29:c6:64:82 by local choice (reason=3)
[ 1282.378098] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 1282.378114] cfg80211: Restoring regulatory settings
[ 1282.378127] cfg80211: Calling CRDA to update world regulatory domain
[ 1282.388214] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 1282.388223] cfg80211: World regulatory domain updated:
[ 1282.388227] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1282.388234] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1282.388240] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1282.388245] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1282.388250] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1282.388255] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1288.335106] wlan0: authenticate with 00:21:29:c6:64:82
[ 1288.339419] wlan0: send auth to 00:21:29:c6:64:82 (try 1/3)
[ 1288.343622] wlan0: authenticated
[ 1288.344118] wlan0: associate with 00:21:29:c6:64:82 (try 1/3)
[ 1288.349845] wlan0: RX AssocResp from 00:21:29:c6:64:82 (capab=0x411 status=0 aid=7)
[ 1288.349855] wlan0: associated
[ 1293.790802] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1299.727550] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1309.349929] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1316.720139] ICMPv6 RA: ndisc_router_discovery() failed to add default route.
[ 1323.786391] ICMPv6 RA: ndisc_router_discovery() failed to add default route.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.4.0-1-generic 3.4.0-1.3
ProcVersionSignature: Ubuntu 3.4.0-1.3-generic 3.4.0-rc5
Uname: Linux 3.4.0-1-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu7
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: torstein 1836 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf3920000 irq 46'
   Mixer name : 'Conexant CX20590'
   Components : 'HDA:14f1506e,17aa21ce,00100000'
   Controls : 20
   Simple ctrls : 10
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: Thu May 10 21:43:19 2012
HibernationDevice: RESUME=UUID=f2dc33e1-9733-4245-bab0-f49e03180d13
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120510)
MachineType: LENOVO 4177CTO
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 0 inteldrmfb
 1 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.4.0-1-generic root=UUID=42670cd3-c56a-40d4-a799-924955cc21c9 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-3.4.0-1-generic N/A
 linux-backports-modules-3.4.0-1-generic N/A
 linux-firmware 1.80
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/28/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 83ET67WW (1.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4177CTO
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:bvr83ET67WW(1.37):bd11/28/2011:svnLENOVO:pn4177CTO:pvrThinkPadT420:rvnLENOVO:rn4177CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4177CTO
dmi.product.version: ThinkPad T420
dmi.sys.vendor: LENOVO

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a kernel version where you were not having this particular problem? This will help determine if the problem you are seeing is the result of the introduction of a regression, and when this regression was introduced

[Torstein Bø (haarek)]

It happened after I installed a clean ubuntu 12.10 from live cd.
This is not a problem in 12.04 which I have installed on another partition.

[Torstein Bø (haarek)]

A workaround of the problem is to set edit the connection and in "IPv6 Settings" set method to "Ignore".

[Joseph Salisbury (jsalisbury)]

I'd like to perform a kernel bisect to find the commit that introduced this regression. Would it be possible for you to test a few kernels?

If so, Can you first test the following kernels to and report back which kernel(s) have the bug:

v3.2.17: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.2.17-precise/
v3.3.6: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.3.6-precise/
v3.4-rc1 http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-rc1-precise/

Based on your results, we can narrow down when the regression was introduced.

Thanks in advance!

[Torstein Bø (haarek)]

Thanks for all help!

I have tested the suggested kernels and only v3.2.17 works, both the other two gives the same problem as before.

I can gladly test more kernels, if that helps!

[Torstein Bø (haarek)]

To try to pin point it even more I also tested v3.3-rc1-precise/ and v3.3.1-precise/, both did not work.

[Joseph Salisbury (jsalisbury)]

Thanks for testing, Torstein.

There will be a few test kernels generated during the Bisect. I will build the first test kernel between version 3.2.17 and 3.3-rc1. I'll post a link to the kernel shortly.

[Thomas Hood (jdthood)]

Does it make any difference if you comment out "dns=dnsmasq" in /etc/NetworkManager/NetworkManager.conf?

[Joseph Salisbury (jsalisbury)]

I built the first test kernel, but to the following commit:
2ac9d7aaccbd598b5bd19ac40761b723bb675442

The test kernel can be downloaded from:
http://people.canonical.com/~jsalisbury/lp997774/

Can you test that kernel and report back if it has the bug or not. I will build the next test kernel based on your test results.

Thanks in advance

[Torstein Bø (haarek)]

I now tested both method.
It did not work to comment out "dns=dnsmasq" in /etc/NetworkManager/NetworkManager.conf

However, the kernel worked!

[Joseph Salisbury (jsalisbury)]

Thanks for testing that kernel, Torstein. I'll update the bisect and build the next kernel.

[Joseph Salisbury (jsalisbury)]

I built the next test kernel, but to the following commit:
a429638cac1e5c656818a45aaff78df7b743004e

The test kernel can be downloaded from:
http://people.canonical.com/~jsalisbury/lp997774/

Can you test that kernel and report back if it has the bug or not. I will build the next test kernel based on your test results.

Thanks in advance

[Torstein Bø (haarek)]

I have now updated the default kernel and the problem seems to have been fixed!

Thanks to everybody who have helped!

[Leann Ogasawara (leannogasawara)]

Per comment #14, I'm closing this as Fix Released against the kernel. Thanks.

[Carnalbeast (carnalbeast)]

I have the same problem i have full signal on my wifi , it connects to the wifi i have internet access for 2-3 minutes then i have no internet access , the wifi is still connected !
when im trying to disconnect and reconnect i have internet access again but only for 1-3 minutes !
This is weird !
And i like so much the new version of ubuntu.

[Joseph Salisbury (jsalisbury)]

@Carnalbeast,

Can you open a new bug for your issue? That will allow us to review the details of your system.