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I have tried connecting to WiFi in my Dell Vostro laptop, distribution is Ubuntu 12.04 LTS. The wicd network manager shows No wireless networks found.

Output of lsusb&&lspci is:

Bus 001 Device 002: ID 8087:8000 Intel Corp.  <br/>
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub  <br/>
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub  <br/>
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub  <br/>
Bus 001 Device 003: ID 0c45:6a04 Microdia   <br/>
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp.   <br/>
00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)  <br/>
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)  <br/>
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)  <br/>
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)  <br/>
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)  <br/>
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)  <br/>
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1 (rev e4)  <br/>
00:1c.2 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)  <br/>
00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4) <br/>
00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)  <br/>
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)  <br/>
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)  <br/>
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)  <br/>
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)  <br/>
06:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)  <br/>
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)  <br/>
08:00.0 3D controller: NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M / GT 620M/625M/630M/720M] (rev ff)  <br/>
Fabby
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Shaswati
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  • Welcome to Ask Ubuntu! ;-) Could you please give us a bit more information like: what WiFi hardware you're using? Please provide the output to lsusb&&lspci. Please [edit] your question and add this information... – Fabby Feb 23 '15 at 14:08
  • Please [edit] your question so that the next person reading your question does not have to read all the comments (and you can only have a maximum of 10 comments). Also please read the editing help to improve the readability of your question. – Fabby Feb 23 '15 at 14:24
  • I have edited my original question. Any luck on resolution? – Shaswati Feb 24 '15 at 05:13
  • Yes! Look at the above link and follow it carefully. This is the best resource we have on this site for Broadcom drivers. If anything would go wrong there, just leave a comment here and then we'll take it from there. ;-) – Fabby Feb 24 '15 at 05:49
  • That is the link I followed to remove hard block but still my WICD network manager throwing error "No wireless networks found." Please help. – Shaswati Feb 24 '15 at 08:11
  • I've asked for expert expert help as this seems to be a PCI-based broadcom adapter. Help will arrive in about 4-8 hours... – Fabby Feb 24 '15 at 08:16

1 Answers1

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Why did you install Wicd in preference to Network Manager? Did you remove NM? Please verify which driver is installed:

lsmod | grep -e wl -e b43

And verify that the hard block is solved:

rfkill list all

What messages are given if you try to scan?

sudo iwlist wlan0 scan

Substitute eth1 for wlan0 if that is your wireless interface. Also, what is your kernel version?

uname -r

I am not sure any solution is even possible for kernels before 3.13.

You have a 3.5.0-xx kernel. It may or may not be possible to download and install this: https://launchpad.net/ubuntu/raring/amd64/bcmwl-kernel-source/6.20.155.1+bdcom-0ubuntu1 as well as the prerequisite dkms package: https://launchpad.net/ubuntu/raring/amd64/dkms

This assumes you have a 64-bit install; find out:

arch

If you have a 32-bit install, I will do additional research and edit this answer.

If, on the other hand, you installed Ubuntu 14.04 LTS, it should work out of the box, either 32- or 64-bit.

chili555
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  • 3.5.0-58-generic – Shaswati Feb 24 '15 at 15:17
  • Please see my edit above. – chili555 Feb 24 '15 at 15:33
  • Errors were encountered while processing: bcmwl-kernel-source – Shaswati Feb 24 '15 at 16:16
  • Please tell us the exact error; it may be correctable. – chili555 Feb 24 '15 at 16:34
  • I tried to install the two .deb files today morning to reproduce the errors, strangely, did not encounter errors but still wicd manager showing "No wireless networks found." – Shaswati Feb 25 '15 at 07:57
  • What errors, if any, are seen when you: sudo iwlist wlan0 scan. Substitute eth1 if your interface is eth1. – chili555 Feb 25 '15 at 12:33
  • sudo iwlist wlan0 scan [sudo] password for shaswati: wlan0 Interface doesn't support scanning. – Shaswati Feb 25 '15 at 14:37
  • What is your interface? iwconfig. If it is eth1, then: sudo iwlist eth1 scan. – chili555 Feb 25 '15 at 14:47
  • The issue is with the scan argument I guess. Output is a follows - sudo iwlist eth1 scan eth1 Interface doesn't support scanning : Invalid argument – Shaswati Feb 25 '15 at 14:52
  • Output of iwconfig eth0 no wireless extensions.

    eth1 IEEE 802.11abg ESSID:off/any
    Mode:Managed Access Point: Not-Associated
    Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off

    lo no wireless extensions.

     – Shaswati Feb 25 '15 at 15:03
  • Hi...Any resolution found yet? – Shaswati Feb 26 '15 at 08:35
  • May we see: rfkill list all and also: dmesg | grep -e wl -e eth1 As the result is probably lengthy, post it here and give us a link: http://paste.ubuntu.com – chili555 Feb 26 '15 at 13:31
  • Pasted both outputs, u can access the output in the following url - http://paste.ubuntu.com/10428966/ – Shaswati Feb 26 '15 at 13:37
  • "ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)" That's why it doesn't scan and see networks. As I suspected, the version of bcmwl-kernel-source that matches your running kernel, 3.5.0-xx, won't properly drive your device. I suggest you upgrade to Ubuntu 14.04 LTS where it will work from the outset. – chili555 Feb 26 '15 at 14:20
  • Thank you for the suggestion. Would soon upgrade to 14.04 LTS – Shaswati Feb 26 '15 at 15:17