I have been using wireless seamlessly since I upgraded to Ubuntu 12.04 LTS. I did a botched attempt of installing Octave 3.6, at that time I was connected via Ethernet. I postponed that installation till later, but when I went home and tried to connect to a wireless network realized that Ubuntu is not detecting the wireless adapter..the blue light did not come up even after toggling hardware key. On booting into windows OS I was able to confirm that the adopter is working and I could connect to wireless network. Since then I have tried a number of things including re-installing BCM drivers as mentioned on other threads but nothing worked.
Here is the current status of my machine and wireless adapter....
lspci -v
0c:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
Subsystem: Dell Wireless 1397 WLAN Mini-Card
Flags: bus master, fast devsel, latency 0, IRQ 3
Memory at f69fc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel modules: ssb
lsmod
Module Size Used by
ip6table_filter 12815 0
ip6_tables 27864 1 ip6table_filter
iptable_filter 12810 0
ip_tables 27473 1 iptable_filter
x_tables 29891 4 ip6table_filter,ip6_tables,iptable_filter,ip_tables
vesafb 13844 1
parport_pc 32866 0
ppdev 17113 0
rfcomm 42651 0
lp 17799 0
parport 46562 3 parport_pc,ppdev,lp
bnep 18139 2
joydev 17693 0
bluetooth 205289 10 rfcomm,bnep
binfmt_misc 17540 1
nfsd 277884 2
nfs 356377 0
lockd 90326 2 nfsd,nfs
fscache 61568 1 nfs
auth_rpcgss 53380 2 nfsd,nfs
nfs_acl 12883 2 nfsd,nfs
sunrpc 241772 6 nfsd,nfs,lockd,auth_rpcgss,nfs_acl
psmouse 97485 0
serio_raw 13211 0
video 19596 0
compat 20099 3 rfcomm,bnep,bluetooth
e1000e 156715 0
lshw -C network
*-network UNCLAIMED
description: Network controller
product: BCM4312 802.11b/g LP-PHY
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:0c:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: memory:f69fc000-f69fffff
uname -a
Linux ubuntu 3.2.0-35-virtual #55-Ubuntu SMP Wed Dec 5 18:02:05 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
sudo modprobe wl
FATAL: Module wl not found.
Thanks in advance for any help.
- UPDATE
After trying the answer below:
fsheikh@ubuntu:~$ sudo apt-get remove --purge bcmwl-kernel-source
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package bcmwl-kernel-source is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
fsheikh@ubuntu:~$ sudo apt-get install firmware-b43-lpphy-installer
Reading package lists... Done
Building dependency tree
Reading state information... Done
firmware-b43-lpphy-installer is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
fsheikh@ubuntu:~$ sudo modprobe b43
WARNING: Error inserting bcma (/lib/modules/3.2.0-35-virtual/updates/cw-3.6 /bcma.ko): Unknown symbol in module, or unknown parameter (see dmesg)
WARNING: Error inserting cfg80211 (/lib/modules/3.2.0-35-virtual/updates/cw-3.6/cfg80211.ko): Unknown symbol in module, or unknown parameter (see dmesg)
WARNING: Error inserting mac80211 (/lib/modules/3.2.0-35-virtual/updates/cw-3.6/mac80211.ko): Unknown symbol in module, or unknown parameter (see dmesg)
FATAL: Error inserting b43 (/lib/modules/3.2.0-35-virtual/updates/cw-3.6/b43.ko): Unknown symbol in module, or unknown parameter (see dmesg)
