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I can use my wireless connection without problems either on ubuntu 10.04 or win7, but can't on ubuntu 11.10. I'm just unable to find any connection. On terminal

rfkill list all

with only wireless softblocked; when trying to

rfkill unblock all

or rfkill unblock wifi

it is still softblocked.

nm-tool

Shows, that i'm disconected and state for wlan0 is unavaible

lshw -C network
*-network 
   description: Wireless interface 
   product: Centrino Wireless-N 1000 
   vendor: Intel Corporation 
   physical id: 0 
   bus info: pci@0000:09:00.0 
   logical name: wlan0 
   version: 00 
   serial: 74:e5:0b:18:20:a0 
   width: 64 bits 
   clock: 33MHz 
   capabilities: bus_master cap_list ethernet physical wireless 
   configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=39.31.5.1 build 35138 latency=0 multicast=yes wireless=IEEE 802.11bgn 
   resources: irq:45 memory:e1d00000-e1d01fff

So is physical id=0 a problem? is that ubuntu dosen't recognize my wireless interface?

Is there anything to change this? Or just use the older version of ubuntu?

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please add the entire output of rfkill list all into your question. –  fossfreedom Nov 22 '11 at 21:18
    
I don't think the physical id is the problem -- my non-working centrino wireless network card and my perfectly working realtek ethernet cart both show physical id: 0. –  James Green Nov 24 '11 at 2:51

2 Answers 2

answer from here: http://ubuntuforums.org/showthread.php?t=1760181

$ rfkill list all
$ sudo rmmod -f acer_wmi
$ sudo rfkill unblock all
$ sudo su
# echo "blacklist acer_wmi" >> /etc/modprobe.d/blacklist.conf
# exit
share|improve this answer

I found a workaround for the above problem while trying out different distributions and going to the different discussion forums.

"To (temporarily) get the wireless working on newer kernels:

sudo mv /lib/firmware/iwlwifi-1000-5.ucode /lib/firmware/iwlwifi-1000-5.ucode.backup
sudo modprobe -r iwlagn
sudo modprobe iwlagn

This should make the wireless use the old 1000-3.ucode which works at the moment."

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