Ethernet Network card BCM4401-B0 no longer recognised?
I updated Ubuntu to 14.04 LTS and I can no longer see my network - No network devices available shows in the network drop down menu. Networking is enabled and if I choose to boot my Dell Inspiron 1300 from the network I do see some activity on the card but none in Linux. Both lights on the nic stay on permanently.
I don't know where to look for the equivalent of event viewer or similar to even start to troubleshoot, having only about two hours with the install before I updated. Original install was last October.
Any pointers on where to look in logs etc would be gratefully received.
02:00.0 Ethernet controller [0200]: Broadcomm Corporation BCM4401-B0 100base-tx [14e4:170c] (Rev 02)
Subsystem dell Device [1028:01c9]
cat /etc/modprobe.d/blacklist-bcm43.conf
# 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
blacklist b44
install wl
modprobe -r b43 b44 b43legacy ssb; modprobe --ignore-install wl ; modprobe --ignore-install b44
Solution 1:
Your wired network driver b44
is probably blacklisted by your wireless driver.
This should be fixed by
sudo -H gedit /etc/modprobe.d/blacklist-bcm43.conf
And removing blacklist b44
, b44
and ; modprobe --ignore-install b44
from the last line.
The file should look this way
# 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
install wl
modprobe -r b43 b43legacy ssb; modprobe --ignore-install wl
Save the file.
After that wired network should work after reboot.
Note In case bcmwl-kernel-source
is upgraded, this procedure probably should be done again.