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$ cat /etc/*release* | grep -i distrib
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=13.10
DISTRIB_CODENAME=saucy
DISTRIB_DESCRIPTION="Ubuntu 13.10"

$ lspci | grep -i bcm
02:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)

$ lshw -c network
*-network               
   description: Network controller
   product: BCM43142 802.11b/g/n
   vendor: Broadcom Corporation
   physical id: 0
   bus info: pci@0000:02:00.0
   version: 01
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list
   configuration: driver=bcma-pci-bridge latency=0
   resources: irq:16 memory:f1900000-f1907fff

$ lsmod | grep -i bcma
bcma                   46670  0 

$ rfkill list
0: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no

$ dmesg | grep -i wlan

$ ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:374 errors:0 dropped:0 overruns:0 frame:0
          TX packets:374 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:40211 (40.2 KB)  TX bytes:40211 (40.2 KB)

seems like the module for the wifi is not loaded (or loaded incorrectly). i will appreciate if one could shed the light on the issue and assist bringing the wifi up again.

also tried

$ rmmod bcma
$ modprobe bcma

but it did not help

update: i did the following and it seems to help. can it be?

$ apt-get install bcmwl-kernel-source
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1 Answer 1

Remember to update your Ask Ubuntu's account profile and provide a name and a picture so others can know who they are talking to. This data are shown below a question, answer or comment made by you in order to identify your self.

Problems concerning Broadcom wireless cards not being recognized, panicing the kernel and other compatibility issues, happends on a regular basis. The source may be the Broadcom's package/driver called 'bcmwl-kernel-source', which is automaticaly installed by Ubuntu. Check out what I've written at the link below, and also at the links pointed by it, to see if the case described is the same you're experiencing.

http://askubuntu.com/a/428712/254056

At the end, don't forget to give us a feedback and help the community!

Cheers!

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