I recently installed Ubuntu 18.04 (minimal installation), but I have been having issues trying to configure a PCI Wlan card (US robotics with the BCM4318 chip).
I have come to the following resources and guides (although some of them are outdated for the 18.04):
- Correct driver for my card
- Wireless Troubleshooting guide
I managed to modprobe the right driver but no wlan interface is showing up under ifconfig or iwconfig afterwards.
What I have done so far
As the guide stated I started with sudo lshw -C network. The device was found, but hadn't loaded any driver.
So I continued from the driver page. Which made made me naturally do sudo apt-get update and sudo apt-get install firmware-b43-installer.
After apt-get completed I did a reboot (just to make sure). I continued doing what the driver page tells me to do, by unloading any previous drivers:
sudo modprobe -r b43 bcma
sudo modprobe -r brcmsmac bcma
sudo modprobe -r wl
And afterwards load the correct driver.
sudo modprobe b43.
Now lshw -C network states that the driver has been loaded.
*-network
description: Network controller
product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller
vendor: Broadcom Limited
physical id: 0
bus info: pci@0000:03:00.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=b43-pci-bridge latency=32
resources: irq:21 memory:fe400000-fe401fff
And this is where I get stuck afterwards Troubleshooting driver step 3.1.
sudo iwconfig
eno1 no wireless extensions.
lo no wireless extensions.
My lsmod is
Module Size Used by
b43 413696 0
bcma 57344 1 b43
mac80211 778240 1 b43
cfg80211 622592 2 b43,mac80211
ssb 57344 1 b43
gpio_ich 16384 0
snd_hda_codec_realtek 106496 1
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_intel 40960 3
snd_hda_codec 126976 3 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core 81920 4 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 98304 3 snd_hda_intel,snd_hda_codec,snd_hda_core
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
intel_powerclamp 16384 0
coretemp 16384 0
kvm_intel 212992 0
kvm 598016 1 kvm_intel
snd_seq 65536 2 snd_seq_midi,snd_seq_midi_event
joydev 24576 0
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
input_leds 16384 0
irqbypass 16384 1 kvm
snd_timer 32768 2 snd_seq,snd_pcm
intel_cstate 20480 0
serio_raw 16384 0
lpc_ich 24576 0
snd 81920 16 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm,snd_rawmidi
mei_me 40960 0
mei 90112 1 mei_me
shpchp 36864 0
soundcore 16384 1 snd
mac_hid 16384 0
sch_fq_codel 20480 2
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 parport_pc,lp,ppdev
ip_tables 28672 0
x_tables 40960 1 ip_tables
autofs4 40960 2
i915 1617920 8
hid_generic 16384 0
i2c_algo_bit 16384 1 i915
drm_kms_helper 172032 1 i915
uas 24576 0
syscopyarea 16384 1 drm_kms_helper
psmouse 147456 0
i2c_i801 28672 0
usb_storage 69632 1 uas
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
usbhid 49152 0
fb_sys_fops 16384 1 drm_kms_helper
e1000e 249856 0
hid 118784 2 usbhid,hid_generic
drm 401408 5 drm_kms_helper,i915
ptp 20480 1 e1000e
pata_acpi 16384 0
pps_core 20480 1 ptp
video 45056 1 i915
Just to make some things clear, yes the card is still functional, the computer was running Windows 10 until yesterday, with the WLAN card as it's main network interface. I have disabled any power saving functions in the BIOS, just to rule it out. And I'm now posting from this machine over cable.