No wifi after update

[Pablo Antonio]

Today, March 31, I updated my Natty installation. After reboot, the network applet didn't show wifi anymore. Same happens after many reboots. I can connect via a wired connection only.

The first time I rebooted I saw a message on screen while Ubuntu was booting that said something about the network card. I don't remember exactly what it said (it dissappeared quickly) and I couldn't find it in the logs.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic 2.6.38-7.39
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: pablo 1722 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe9fc000 irq 46'
   Mixer name : 'Silicon Image SiI1392 HDMI'
   Components : 'HDA:83847616,1028020a,00100201 HDA:10951392,1028020a,00100000'
   Controls : 32
   Simple ctrls : 20
CheckboxSubmission: 6d595a5759ac779c2dd93ffb6ae9a5db
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Fri Apr 1 05:24:58 2011
HibernationDevice: RESUME=UUID=033a937c-ed72-4cc3-84f7-59da85249ec0
MachineType: Dell Inc. XPS M1330
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: root=UUID=a880b37c-e0a4-4bd0-bf22-1e3efff131be ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic N/A
 linux-backports-modules-2.6.38-7-generic N/A
 linux-firmware 1.49
RfKill:
 0: dell-wifi: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-03-25 (7 days ago)
WpaSupplicantLog:

dmi.bios.date: 09/03/2007
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd09/03/2007:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.

[Pablo Antonio (crazy2k)]

I installed a mainline kernel and the issue persists:

$ uname -a
Linux dell-desktop 2.6.39-999-generic #201103310912 SMP Thu Mar 31 10:35:28 UTC 2011 i686 i686 i386 GNU/Linux

[Jacopo Moronato (jmoronat)]

Same here, I have an Intel PRO/Wireless 3945ABG (iwl3945 driver).
Happened after installing latest kernel updates.

[Jacopo Moronato (jmoronat)]

Pablo, do you have an iwl3945 ?

[Martins Brics (martins-brics2)]

Have the same problem with iwl3945 driver, but there was no kernel updates. So it should be other package. At boot I see iwl3945: Unknown parameter '11n_disable' error

[Jacopo Moronato (jmoronat)]

Ok, remarked as new in the meantime.
 A quick fix found: http://ubuntuforums.org/showthread.php?t=1718980

[Pablo Antonio (crazy2k)]

It's fixed now. Thank you!