Ubuntu: Installed lubuntu 14.04 on an Acer Aspire 5517 and can't connect to wireless



Question:

$ iwconfig    lo        no wireless extensions.    eth0      no wireless extensions.    $ ifconfig -a    eth0      Link encap:Ethernet  HWaddr 70:5a:b6:08:b3:21              inet addr:192.168.1.25  Bcast:192.168.1.255  Mask:255.255.255.0            inet6 addr: fe80::725a:b6ff:fe08:b321/64 Scope:Link            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1            RX packets:15337 errors:0 dropped:0 overruns:0 frame:0            TX packets:11030 errors:0 dropped:0 overruns:0 carrier:5            collisions:0 txqueuelen:1000             RX bytes:8673692 (8.6 MB)  TX bytes:1339434 (1.3 MB)    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:8288 errors:0 dropped:0 overruns:0 frame:0            TX packets:8288 errors:0 dropped:0 overruns:0 carrier:0            collisions:0 txqueuelen:0             RX bytes:787813 (787.8 KB)  TX bytes:787813 (787.8 KB)  

But lspci sees the Broadcom device:

$ lspci    00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] RS780 Host Bridge  00:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (int gfx)  00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 0)  00:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 1)  00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode]  00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller  00:12.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0 USB OHCI1 Controller  00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller  00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 3c)  00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA)  00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller  00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge  00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration  00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Address Map  00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] DRAM Controller  00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Miscellaneous Control  01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS780M [Mobility Radeon HD 3200]  02:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)  08:00.0 Ethernet controller: Qualcomm Atheros AR8132 Fast Ethernet (rev c0)  

How can I fix this?


Solution:1

I have seen some users with the same card having the same problem (Installing Broadcom Wireless Drivers)

A known issue is that jockey; also known as Additional Drivers, suggests the wrong driver for a few Broadcom cards.

Please open a terminal and run and post:

sudo apt-get install --reinstall bcmwl-kernel-source  

After it's done, do:

sudo modprobe wl   

If there is no error or warning, your wireless should be working.

OP indicates that an additional step was required to get this solution working. See below

After following all of the steps here, I had to additionally install the b43 firmware package like so:

sudo apt-get install firmware-b43-installer  

Then it worked after a reboot.


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