Public bug reported:
After upgrading to lucid I got an unstable wifi connection: it
frequently got lost and was sometimes not able to reconnect. The problem
was logged as follows:
-----kern.log fragment begin -----
Jun 13 11:21:52 dimitry-laptop kernel: [10999.508078] No probe response from AP
00:18:9b:68:d4:3f after 500ms, disconnecting.
Jun 13 11:21:55 dimitry-laptop kernel: [11002.350862] wlan0: direct probe to AP
00:18:9b:68:d4:3f (try 1)
Jun 13 11:21:55 dimitry-laptop kernel: [11002.548070] wlan0: direct probe to AP
00:18:9b:68:d4:3f (try 2)
Jun 13 11:21:56 dimitry-laptop kernel: [11002.748067] wlan0: direct probe to AP
00:18:9b:68:d4:3f (try 3)
Jun 13 11:21:56 dimitry-laptop kernel: [11002.948065] wlan0: direct probe to AP
00:18:9b:68:d4:3f timed out
Jun 13 11:22:08 dimitry-laptop kernel: [11015.212626] wlan0: direct probe to AP
00:18:9b:68:d4:3f (try 1)
Jun 13 11:22:08 dimitry-laptop kernel: [11015.412114] wlan0: direct probe to AP
00:18:9b:68:d4:3f (try 2)
Jun 13 11:22:08 dimitry-laptop kernel: [11015.612078] wlan0: direct probe to AP
00:18:9b:68:d4:3f (try 3)
Jun 13 11:22:08 dimitry-laptop kernel: [11015.616381] wlan0: direct probe
responded
Jun 13 11:22:08 dimitry-laptop kernel: [11015.616389] wlan0: authenticate with
AP 00:18:9b:68:d4:3f (try 1)
Jun 13 11:22:08 dimitry-laptop kernel: [11015.620184] wlan0: authenticated
Jun 13 11:22:08 dimitry-laptop kernel: [11015.620227] wlan0: associate with AP
00:18:9b:68:d4:3f (try 1)
Jun 13 11:22:08 dimitry-laptop kernel: [11015.624148] wlan0: RX AssocResp from
00:18:9b:68:d4:3f (capab=0x411 status=0 aid=3)
Jun 13 11:22:08 dimitry-laptop kernel: [11015.624156] wlan0: associated
Jun 13 11:28:33 dimitry-laptop kernel: [11400.556083] No probe response from AP
00:18:9b:68:d4:3f after 500ms, disconnecting.
-----kern.log fragment end -----
After looking for help in forums I found out that the problem can be
solved by executing a command
echo 'options iwl3945 disable_hw_scan=1' | sudo tee /etc/modprobe.d
/options-iwl3945.conf
setting an option to disable a hardware scan for iwl3945 which probably
should be the default because the hardware scan seems to make probelms .
After executing this command and reboot the wifi connection remains
stable, but another problem comes: following messages are added to
kern.log every two minutes:
----kern.log fragment begin ----
Jun 19 10:17:51 dimitry-laptop kernel: [ 6931.868077] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 100 [0]
Jun 19 10:17:52 dimitry-laptop kernel: [ 6932.292076] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 104 [0]
Jun 19 10:17:52 dimitry-laptop kernel: [ 6932.716078] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 108 [0]
Jun 19 10:17:53 dimitry-laptop kernel: [ 6933.140077] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 112 [0]
Jun 19 10:17:53 dimitry-laptop kernel: [ 6933.564085] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 116 [0]
Jun 19 10:17:54 dimitry-laptop kernel: [ 6933.988073] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 120 [0]
Jun 19 10:17:54 dimitry-laptop kernel: [ 6934.416079] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 124 [0]
Jun 19 10:17:54 dimitry-laptop kernel: [ 6934.844068] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 128 [0]
Jun 19 10:17:55 dimitry-laptop kernel: [ 6935.268072] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 132 [0]
Jun 19 10:17:55 dimitry-laptop kernel: [ 6935.692078] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 136 [0]
Jun 19 10:17:56 dimitry-laptop kernel: [ 6936.120085] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 140 [0]
Jun 19 10:19:51 dimitry-laptop kernel: [ 7051.868087] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 100 [0]
Jun 19 10:19:52 dimitry-laptop kernel: [ 7052.292083] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 104 [0]
Jun 19 10:19:52 dimitry-laptop kernel: [ 7052.716081] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 108 [0]
Jun 19 10:19:53 dimitry-laptop kernel: [ 7053.140081] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 112 [0]
Jun 19 10:19:53 dimitry-laptop kernel: [ 7053.564092] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 116 [0]
Jun 19 10:19:54 dimitry-laptop kernel: [ 7053.988089] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 120 [0]
Jun 19 10:19:54 dimitry-laptop kernel: [ 7054.412082] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 124 [0]
Jun 19 10:19:54 dimitry-laptop kernel: [ 7054.840086] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 128 [0]
Jun 19 10:19:55 dimitry-laptop kernel: [ 7055.264088] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 132 [0]
Jun 19 10:19:55 dimitry-laptop kernel: [ 7055.688092] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 136 [0]
Jun 19 10:19:56 dimitry-laptop kernel: [ 7056.112085] iwl3945 0000:0b:00.0:
Failed to get channel info for channel 140 [0]
----kern.log fragment end ----
So it looks like there are two different problems in iwl3945.
Regards,
Dimitry Polivaev
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic 2.6.32-22.36
Regression: No
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: dimitry 1302 F.... pulseaudio
/dev/snd/controlC0: dimitry 1302 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xefebc000 irq 21'
Mixer name : 'SigmaTel STAC9200'
Components : 'HDA:83847690,102801bd,00102201
HDA:14f12bfa,14f100c3,00090000'
Controls : 11
Simple ctrls : 6
Card1.Amixer.info:
Card hw:1 'U0x46d0x8da'/'USB Device 0x46d:0x8da at usb-0000:00:1d.0-1, full
speed'
Mixer name : 'USB Mixer'
Components : 'USB046d:08da'
Controls : 3
Simple ctrls : 2
Date: Sat Jun 19 10:48:02 2010
Frequency: Once a day.
HibernationDevice: RESUME=UUID=c83a8931-8f8f-4498-8f8f-c9ffbf875057
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: Dell Inc. MM061
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic
root=UUID=c25b28ed-5afd-46c6-bfde-dcdbc559f526 ro quiet splash
ProcEnviron:
PATH=(custom, user)
LANG=en_US.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 04/02/2007
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A14
dmi.board.name: 0KD882
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA14:bd04/02/2007:svnDellInc.:pnMM061:pvr:rvnDellInc.:rn0KD882:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: MM061
dmi.sys.vendor: Dell Inc.
** Affects: ubuntu
Importance: Undecided
Status: New
--
iwl3945 driver bugs
https://bugs.launchpad.net/bugs/596203
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