Broadcom Corporation BCM4312 disabled by kernel update

**rioguia** · December 3rd, 2012

[I REPOSTED THEM AFTER I REALIZED THAT I ACCIDENTALLY POSTED TO A STICKY]

The Update Manager updated my kernel today and it disabled my wireless. Prior to the kernel update, I used the below four-step solution to fix my wireless connection problem (recovered from my terminal history). I need help in making the correct module load when I reboot.

My wireless network card is Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)

Code:

lspci -vvnn | grep 14e4
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)

I repeated the below four steps using a wired connection and my wireless network card becomes available. Unfortunately, I have to repeat steps three and four each time I reboot. I suspect that the wrong module is being loaded and fails, leaving my wireless disabled until I load the modules manually.

FOUR STEP SOLUTION TO INSTALL WIRELESS BROADCOM MODULES

Code:

sudo apt-get purge bcmwl-kernel-source && sudo apt-get install firmware-b43-installer
sudo apt-get install bcmwl-kernel-source
sudo modprobe -r b43 ssb wl brcmfmac brcmsmac bcma
sudo modprobe wl

The problem appears to be related to the /etc/modprobe.d/blacklist-bcm43.conf file which is blocking the modules I need to load. As the file explains, I can't edit the file since it is autogenerated by bcmwl

Code:

# Warning: This file is autogenerated by bcmwl. All changes to this file will be lost.
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma

I would appreciate help in making the correct module load automatically on boot. Thanks.

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Last edited by rioguia; 7 Hours Ago at 12:40 AM.. Reason: LEFT OUT THE PURGE COMMAND FROM MY HISTORY and the /etc/modprobe.d/blacklist-bcm43.conf

**NikTh** · December 3rd, 2012

Hi ,
please try these commands (one at time)

Code:

sudo apt-get remove --purge bcmwl-kernel-source
sudo rm /etc/modprobe.d/blacklist-bcm43.conf
sudo apt-get install firmware-b43-lpphy-installer
echo 'b43' | sudo tee -a /etc/modules

Reboot your PC and see if wireless works.
Thanks

**rioguia** · December 3rd, 2012

thanks! i'll try it when I get home tonight.

**rioguia** · December 3rd, 2012

Thanks for the suggestion but it didn't work.

The driver loaded OK.

Code:

dmesg | grep Broad
[   35.851129] b43-phy0: Broadcom 4312 WLAN found (core revision 15)
[   35.985344] Broadcom 43xx driver loaded [ Features: PNL ]

The wireless doesn't start.

Code:

ifconfig -a

eth0      [OMITTED] 

lo        [OMITTED]

wlan5     Link encap:Ethernet  HWaddr [OMITTED]  
          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)

**chili555** · December 3rd, 2012

Now let's see:

Code:

rfkill list all
dmesg | grep -e b43 -e wlan

Thanks.

**NikTh** · December 4th, 2012

Well , "Doctor" is here , so I leave you in his hands

I'll keep in touch and see the progress !

Thanks

**rioguia** · December 5th, 2012

Thanks for the suggestion. Here is the respone from rfkill list all and dmesg | grep -e b43 -e wlan.

Code:

rfkill list all
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
1: dell-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no

Code:

dmesg | grep -e b43 -e wlan
[    2.238395] b43-pci-bridge 0000:0c:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[    2.238414] b43-pci-bridge 0000:0c:00.0: setting latency timer to 64
[   39.461246] b43-phy0: Broadcom 4312 WLAN found (core revision 15)
[   39.692492] Registered led device: b43-phy0::tx
[   39.692512] Registered led device: b43-phy0::rx
[   39.692533] Registered led device: b43-phy0::radio
[   40.354409] udevd[466]: renamed network interface wlan0 to wlan5