no wifi in ubuntu 11.04

Asked by Camo on 2011-06-04

I installed Ubuntu 11.04, inside Windows, on my Dell VOSTRO 1500 laptop, which carries a Dell Wireless 1390 WLAN Mini-Card. The installation went well, but the wireless is grayed out and not enabled. How can I resolve this problem?

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Can you give the output of:

sudo lshw -C network; lsb-release -a; rfkill list


Camo (cgarth) said : #2

cameron@ubuntu:~$ sudo lshw -C network; lsb-release -a;rfkill list
[sudo] password for cameron:
       description: Network controller
       product: BCM4311 802.11b/g WLAN
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:0c:00.0
       version: 01
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=b43-pci-bridge latency=0
       resources: irq:17 memory:fe8fc000-fe8fffff
       description: Ethernet interface
       product: BCM4401-B0 100Base-TX
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: eth0
       version: 02
       serial: 00:1c:23:86:c8:d7
       size: 10Mbit/s
       capacity: 100Mbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=half latency=64 link=no multicast=yes port=twisted pair speed=10Mbit/s
       resources: irq:17 memory:fe5fe000-fe5fffff
  *-network DISABLED
       description: Wireless interface
       physical id: 1
       logical name: wlan0
       serial: 00:1c:26:26:73:bb
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=b43 driverversion=2.6.38-8-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11bg
No command 'lsb-release' found, did you mean:
 Command 'lsb_release' from package 'lsb-release' (main)
lsb-release: command not found
0: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no
1: dell-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no

I am pretty sure that your wireless adapter is experiencing the following Broadcom driver bug in Ubuntu 11.04:

As I understand it, there are 2 possible solutions for the BCM4311 wireless problem in Ubuntu 11.04:

1) installing b43-fwcutter and firmware-b43-installer as described here:


2) manually installing bcmwl-kernel-source ( from maverick (Ubuntu 10.10) using gdebi

Solution 2 is described here:

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