Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a recently bought hp pavilion dm1 with Ubuntu 11.10 installed. It is able to detect my personal wireless network when in close proximity to the router, however it fails to do so when I'm in a different room (unless I connected previously), let alone at my university. Any thoughts?

output of sudo lshw -c network:

       description: Wireless interface
       product: BCM4313 802.11b/g/n Wireless LAN Controller
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 01
       serial: 60:d8:19:74:73:6b
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=brcmsmac driverversion=3.0.0-13-generic-pae firmware=N/A ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
       resources: irq:16 memory:f0200000-f0203fff
       description: Ethernet interface
       product: RTL8111/8168B PCI Express Gigabit Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: eth0
       version: 06
       serial: 10:1f:74:b7:42:d7
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=N/A latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:41 ioport:2000(size=256) memory:f0104000-f0104fff memory:f0100000-f0103fff

output of iwconfig wlan0:

wlan0     IEEE 802.11bgn  ESSID:"my_wireless"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:16:0A:0F:8A:46   
          Bit Rate=11 Mb/s   Tx-Power=19 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=47/70  Signal level=-63 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:10  Invalid misc:82   Missed beacon:0
share|improve this question
possible duplicate of Broadcom 4313 Signal strength very low on an HP Pavilion dv4 – fossfreedom Dec 12 '11 at 20:31
the solution in that linked question was to install the older 2.6.39 kernel... – fossfreedom Dec 12 '11 at 20:31

Had the same problem with the same card BCM4313. You don't use the proper driver (brcmsmac), the proper driver is wl.

Install the proprietary one from Broadcom.

Then blacklist in /etc/modprob.d/blacklist.conf

blacklist bcm43xx  
blacklist brcmsmac  
blacklist bcma   
blacklist b43    
blacklist ssb

Restart and check that:

lspci -k | grep  wl

Hope it works for you like for me (very strong signal).

share|improve this answer
Welcome to Ask Ubuntu! Thank you for this great answer! If you have a question yourself, then please use the Ask question button to ask a new one. Don't ask it in side of an answer. Hope you enjoy your stay! – Octavian Damiean Feb 3 '12 at 12:13

add contrib and non-free to your source.list


deb wheezy main contrib non-free

run the following command as root:

apt-get update

apt-get install linux-headers-$(uname -r|sed 's,[^-]-[^-]-,,') broadcom-sta-dkms

modprobe -r b44 b43 b43legacy ssb brcmsmac

modprobe wl

and configure you wifi

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.