wireless won't work on Ubuntu 11.04

Asked by William Pabon on 2011-11-01

I have a Dell laptop with dual boot ( Windows XP and Ubuntu 11.05 natty). The wireless card works OK in Windows, but in Ubuntu it doesn't turn on. The device is recognized by the system (Broadcom wireless LAN controller, driver=b43-pci-bridge; logical name: wlan0) but it says it is DISABLED. The wireless icon at the top panel says that the device is not ready (firmware missing). Any ideas to solve this problem? Thanks

Question information

English Edit question
Ubuntu b43-fwcutter Edit question
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Solved by:
Eliah Kagan
Last query:
Last reply:

The information you've provided indicates that your wireless adapter has a Broadcom chipset, so you should be able to get it working in Ubuntu by following the instructions at https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx.

Unfortunately, the community documentation on that site is down right now. Fortunately, the process is usually pretty simple and easy, and while troubleshooting procedures are not detailed here, this is probably enough information to enable you to get it to work: http://linuxwireless.org/en/users/Drivers/b43#Ubuntu.2FDebian

Lalatendu Mohanty (then4way) said : #2

If the wifi card hard blocked you can change by pressing your laptop's WiFi button
or if it is soft block you can override by using rfkill command

rfkill list

rfkill unblock all



Please first connect your wired network adapter to the wireless router using an ethernet cable (also known as a LAN cable).

In order to gather essential troubleshooting information about your wireless card, please follow this procedure:

Step 1:

If you are using the Gnome interface, open the Terminal console via "Applications->Accessories->Terminal"

If you are using the Unity interface, the easiest way to open the Terminal is to use the 'search' function on the dash. Or you can click on the 'More Apps' button, click on the 'See more results' by the installed section, and find it in that list of applications. A third way, available after you click on the 'More Apps' button, is to go to the search bar, and see that the far right end of it says 'All Applications'. You then click on that, and you'll see the full list. Then you can go to Accessories > Terminal after that.

So the methods in Unity are:
Dash > Search for Terminal
Dash > More Apps > 'See More Results' > Terminal
Dash > More Apps > Accessories > Terminal

Step 2: Please copy-paste the following command from https://help.ubuntu.com/community/WirelessTroubleshootingProcedure in Firefox into the Linux Terminal. Do NOT copy-paste from the Email message into the Terminal, as that will only copy PART of the command. The command STARTS with the word sudo and ENDS with the word lsmod. So please copy-paste the ENTIRE command below from Firefox into a Terminal, press <enter>, then enter password when sudo asks for password, then press enter again.

Tip: If you have a wheel mouse or 3 button mouse you do not need to type commands into the Terminal. Highlight the command written on the page. Move your cursor anywhere in the Terminal and press the wheel or middle button. Automatic Copy and paste! No spelling mistakes! No Typos! No other errors!

sudo apt-get update; sudo apt-get install hwinfo grep; sudo lshw -C network; rfkill list; sudo iwlist scanning; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nn; lsusb; sudo lshw -short; uname -a; dmesg | egrep 'acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|ireless|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|ound|p54|prism|rtl|rt2|rt3|rt5|rt6|rt7|usb|witch|wl';sudo dmidecode|egrep 'anufact|roduct|erial|elease'; iwconfig; cat /etc/modprobe.d/* | egrep 'acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|wmi|witch|wl'; cat /var/lib/NetworkManager/NetworkManager.state; sudo hwinfo --netcard ; ps -aux|egrep 'icd|etwork'; sudo lsmod

Step 3: Please post results (copy/paste terminal output) on this thread. The troubleshooters here need to see the full Terminal output from running the above command.

Step 4: Please also specify the exact model and make of your PC (if known) on this thread



William Pabon (williepabon) said : #4

Thanks Eliah Kagan, that solved my question.