2

Problem

I cannot connect to the Internet when connected to my DLink Wireless AC1200 Access Point DAP-1650 via Ubuntu 14.04 Trusty Tahr LTS. I can connect to the Internet when connected to my Netgear Broadband Router WNDR 3700 v3, which unfortunately is further away in the basement through quite a number of walls. Everything works when booted into Windows with both wireless networks.

This is a fresh install of Ubuntu 14.04 Trusty Tahr LTS, installed last week and updated via eth0, and has never worked. I get an IP address assigned, I get the "Connected to " after connecting, but I cannot access anything on my local network or on the internet.

Network

- Comcast Blast 105 Cable Internet
- [Motorola Surfboard SB6121 DOCSIS 3.0][1]
- [Netgear Broadcom Router WNDR 3700 v3][2]
- [DLINK Wireless AC1200 Access Point][3], connected via Gigabit Ethernet to WNDR3700

System

- Ubuntu 14.04 LTS  3.13.0-45-generic #74-Ubuntu SMP (Dual Boot with Windows 7)
- Dell Inspiron N4010

$ lspci -nn -d 14e4:
03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)

$ iwconfig (working connection)
eth0      no wireless extensions.
lo        no wireless extensions.
wlan0     IEEE 802.11abg  ESSID:"NetgearWNDR3700v3"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 4C:60:DE:46:83:FB   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

$ iwconfig (Failed connection)
eth0      no wireless extensions.
lo        no wireless extensions.
wlan0     IEEE 802.11abg  ESSID:"DAP1650"  
          Mode:Managed  Frequency:2.457 GHz  Access Point: F8:E9:03:C9:E3:F0   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

$ dmesg (tailed after trying to connect to DAP-1650)
[ 5030.512332] cfg80211: Calling CRDA to update world regulatory domain
[ 5030.583870] cfg80211: World regulatory domain updated:
[ 5030.583875] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 5030.583877] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5030.583878] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5030.583880] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 5030.583881] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5030.583883] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

Here is the output of lsmod:

$ lsmod |grep -e wl -e brcmsmac
wl                   4207846  0 
lib80211               14381  2 wl,lib80211_crypt_tkip
cfg80211              484040  1 wl

If I go to Settings->Software & Updates->Additional Drivers, there is an entry: Broadcom Corporation: Inspiron M5010/XPS 8300 This device is using an alternate driver. Using Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (proprietary) 1 proprietary driver in use.

Hope this helps!

4
  • Which driver is in use? lsmod | grep -e wl -e brcmsmac Welcome to askubuntu!
    – chili555
    Feb 26, 2015 at 0:34
  • @chili555, I added output from your command to the original question. Looks like it is lib80211, and bcmwl-kernel-source.
    – Mike Tosh
    Feb 26, 2015 at 12:22
  • Please check here: askubuntu.com/questions/569360/…
    – chili555
    Feb 26, 2015 at 13:28
  • SUCCESS! I ran the three commands from the linked question (apt-get purge bcmwl-kernel-source; modprobe -r wl; modprobe brcmsmac) and can now access the Internet via the DAP-1650. Now off to solve my java plugin problems...
    – Mike Tosh
    Feb 27, 2015 at 0:48

1 Answer 1

1

From @chili555's linked answer, the bcmwl-kernel-source package isn't always the right driver for the 14e4:4727.

I ran these commands

sudo apt-get purge bcmwl-kernel-source
sudo modprobe -r wl
sudo modprobe brcmsmac

and my problem was fixed.

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