1

I installed b43-fwcutter & firmware-b43-installer on my ubuntu 16.04 (HP Pavilion G6 - 2149tx) laptop.

sudo apt-get remove --purge bcmwl-kernel-source 
sudo apt-get update
sudo apt-get install b43-fwcutter firmware-b43-installer

But I was unable to create wlan0 interface on my laptop.

ifconfig wlan0 up
wlan0: ERROR while getting interface flags: No such device

My configurations as follows:

iwconfig

lo        no wireless extensions.

wlp7s0b1  IEEE 802.11bgn  ESSID:"ISIS"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: EC:1D:7F:B6:17:58   
          Bit Rate=57.8 Mb/s   Tx-Power=19 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=68/70  Signal level=-42 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:37   Missed beacon:0

eno1      no wireless extensions.

enp0s20u2  no wireless extensions.

ifconfig

eno1      Link encap:Ethernet  HWaddr 84:34:97:7e:d3:80  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

enp0s20u2 Link encap:Ethernet  HWaddr 36:4b:50:b7:ef:c2  
          inet addr:192.168.0.129  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::60df:e107:928f:791/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:833 errors:0 dropped:0 overruns:0 frame:0
          TX packets:874 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:162821 (162.8 KB)  TX bytes:113464 (113.4 KB)

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:472 errors:0 dropped:0 overruns:0 frame:0
          TX packets:472 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:34036 (34.0 KB)  TX bytes:34036 (34.0 KB)

wlp7s0b1  Link encap:Ethernet  HWaddr 68:94:23:c9:1c:d8  
          inet addr:192.168.0.197  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::94f7:b2f:2512:b017/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:25 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2538 (2.5 KB)  TX bytes:7142 (7.1 KB)

And:

tree  /etc/modprobe.d/

/etc/modprobe.d/
├── alsa-base.conf
├── blacklist-ath_pci.conf
├── blacklist-bcm43.conf~
├── blacklist.conf
├── blacklist-firewire.conf
├── blacklist-framebuffer.conf
├── blacklist-modem.conf
├── blacklist-oss.conf -> /lib/linux-sound-base/noOSS.modprobe.conf
├── blacklist-rare-network.conf
├── blacklist-watchdog.conf
├── dkms.conf
├── fbdev-blacklist.conf
├── intel-microcode-blacklist.conf
├── iwlwifi.conf
├── mlx4.conf
└── vmwgfx-fbdev.conf


$ rfkill list all
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

$ dmesg | grep -i firmware
[    0.145271] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    1.315344] [Firmware Bug]: Invalid critical threshold (0)
[    2.426164] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
[   13.536705] bluetooth hci0: Direct firmware load for    brcm/BCM20702A1-0a5c-21e3.hcd failed with error -2

I need to setup wlan0 on my laptop. Thank You.

3
2

Your wireless interface is wlp7s0b1 not wlan0.

1
  • 1
    It is called "predictable interface names" and part of systemd.
    – Rinzwind
    Aug 9 '16 at 12:31

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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