Comment 0 for bug 857297

Wifi is not working after upgrade to Ubuntu 11.04.

The network manager on the task tray states that wireless is disabled by hardware switch. Wireless is enabled in the BIOS and the switch on the laptop is enabled.

I tried the following commands suggested by Seth Forshee (sforshee) and wifi was activated, but when I rebooted wifi was not activated and the following commands did not work again.

sudo modprobe -r acer_wmi
rfkill unblock all

The following command produces --> SIOCSIFFLAGS: Operation not possible due to RF-kill
sudo ifconfig wlan0 up

The following command still shows --> Hard blocked: yes
rfkill list

Wireless works when I swap the Ubuntu HDD with a Windows HDD to test.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D1', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf4500000 irq 46'
   Mixer name : 'Conexant CX20549 (Venice)'
   Components : 'HDA:14f15045,17aa3c19,00100100'
   Controls : 20
   Simple ctrls : 9
Date: Thu Sep 22 19:43:49 2011
HibernationDevice: RESUME=UUID=22ce6467-ced8-4456-9baf-de82e83c8808
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: LENOVO 0687A31
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=UUID=141aba7b-5868-4dc8-9ad6-a11bda38c0fe ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/10/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 66ET60WW (0.11 )
dmi.board.name: INVALID
dmi.board.vendor: LENOVO
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnLENOVO:bvr66ET60WW(0.11):bd06/10/2008:svnLENOVO:pn0687A31:pvrLENOVO3000N200:rvnLENOVO:rnINVALID:rvrNotApplicable:cvnLENOVO:ct10:cvrN/A:
dmi.product.name: 0687A31
dmi.product.version: LENOVO3000 N200
dmi.sys.vendor: LENOVO