我刚刚在笔记本电脑上安装了 Ubuntu14.04，安装后我没有看到 Wifi 选项，然后我尝试了下面的方法
sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree
sudo modprobe b43
sudo su
echo "b43" >> /etc/modules
正如所提到的这个视频
这是 Wifi 驱动程序的屏幕截图
########## wireless info START ##########
Report from: 09 Nov 2015 21:35 IST +0530
Booted last: 09 Nov 2015 20:55 IST +0530
Script from: 27 Sep 2015 00:34 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
##### kernel ############################
Linux 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
01:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM57785 Gigabit Ethernet PCIe [14e4:16b5] (rev 10)
Subsystem: Acer Incorporated [ALI] Device [1025:0605]
Kernel driver in use: tg3
02:00.0 Network controller [0280]: Broadcom Corporation BCM43227 802.11b/g/n [14e4:4358]
Subsystem: Foxconn International, Inc. Device [105b:e040]
Kernel driver in use: bcma-pci-bridge
##### lsusb #############################
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 064e:d20c Suyin Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0bb4:0c02 HTC (High Tech Computer Corp.) Dream / ADP1 / G1 / Magic / Tattoo (Debug)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
##### lsmod #############################
wl 6369280 0
acer_wmi 20480 0
sparse_keymap 16384 1 acer_wmi
b43 421888 0
bcma 53248 1 b43
mac80211 708608 1 b43
ssb 65536 1 b43
cfg80211 524288 3 wl,b43,mac80211
video 20480 1 acer_wmi
wmi 20480 1 acer_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
inet addr:192.168.0.102 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::<IP6 'eth0' [IF]>/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:39300 errors:0 dropped:0 overruns:0 frame:0
TX packets:32116 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:37458781 (37.4 MB) TX bytes:4038182 (4.0 MB)
Interrupt:16
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 784 1 0 20:55 ? 00:00:00 NetworkManager
##### NetworkManager info ###############
NetworkManager Tool
State: connected (global)
- Device: eth0 [Wired connection 1] -------------------------------------------
Type: Wired
Driver: tg3
State: connected
Default: yes
HW Address: <MAC 'eth0' [IF]>
Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s
Wired Properties
Carrier: on
IPv4 Settings:
Address: 192.168.0.102
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 192.168.0.1
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/Wi-Fi connection 1]] (600 root)
[connection] id=Wi-Fi connection 1 | type=802-11-wireless
[802-11-wireless] ssid=Subodh
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Asia/Kolkata (based on set time zone)
country 00:
(2402 - 2472 @ 40), (3, 20)
(2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
(5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
##### iwlist channels ###################
eth0 no frequency information.
lo no frequency information.
##### iwlist scan #######################
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
##### module infos ######################
[wl]
filename: /lib/modules/3.19.0-32-generic/updates/dkms/wl.ko
license: MIXED/Proprietary
srcversion: 9A49255BA90267D99664757
depends: cfg80211
vermagic: 3.19.0-32-generic SMP mod_unload modversions
parm: passivemode:int
parm: wl_txq_thresh:int
parm: oneonly:int
parm: piomode:int
parm: instance_base:int
parm: nompc:int
parm: intf_name:string
[b43]
filename: /lib/modules/3.19.0-32-generic/kernel/drivers/net/wireless/b43/b43.ko
firmware: b43/ucode9.fw
firmware: b43/ucode5.fw
firmware: b43/ucode16_mimo.fw
firmware: b43/ucode15.fw
firmware: b43/ucode14.fw
firmware: b43/ucode13.fw
firmware: b43/ucode11.fw
license: GPL
author: Rafał Miłecki
author: Gábor Stefanik
author: Michael Buesch
author: Stefano Brivio
author: Martin Langer
description: Broadcom B43 wireless driver
srcversion: 11BDA0A580599B083FE4F2B
depends: bcma,ssb,mac80211,cfg80211
intree: Y
vermagic: 3.19.0-32-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 0C:8B:EF:E0:C1:E2:89:E4:D8:99:09:26:11:7A:DA:3B:DF:EB:41:9C
sig_hashalgo: sha512
parm: bad_frames_preempt:enable(1) / disable(0) Bad Frames Preemption (int)
parm: fwpostfix:Postfix for the .fw files to load. (string)
parm: hwpctl:Enable hardware-side power control (default off) (int)
parm: nohwcrypt:Disable hardware encryption. (int)
parm: hwtkip:Enable hardware tkip. (int)
parm: qos:Enable QOS support (default on) (int)
parm: btcoex:Enable Bluetooth coexistence (default on) (int)
parm: verbose:Log message verbosity: 0=error, 1=warn, 2=info(default), 3=debug (int)
parm: pio:Use PIO accesses by default: 0=DMA, 1=PIO (int)
parm: allhwsupport:Enable support for all hardware (even it if overlaps with the brcmsmac driver) (int)
[bcma]
filename: /lib/modules/3.19.0-32-generic/kernel/drivers/bcma/bcma.ko
license: GPL
description: Broadcom's specific AMBA driver
srcversion: F17244FFF75F9BDF92327ED
depends:
intree: Y
vermagic: 3.19.0-32-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 0C:8B:EF:E0:C1:E2:89:E4:D8:99:09:26:11:7A:DA:3B:DF:EB:41:9C
sig_hashalgo: sha512
[mac80211]
filename: /lib/modules/3.19.0-32-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 6AE775D26377F997426A49D
depends: cfg80211
intree: Y
vermagic: 3.19.0-32-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 0C:8B:EF:E0:C1:E2:89:E4:D8:99:09:26:11:7A:DA:3B:DF:EB:41:9C
sig_hashalgo: sha512
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[ssb]
filename: /lib/modules/3.19.0-32-generic/kernel/drivers/ssb/ssb.ko
license: GPL
description: Sonics Silicon Backplane driver
srcversion: 551AE4C23939F7FBED9DA61
depends:
intree: Y
vermagic: 3.19.0-32-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 0C:8B:EF:E0:C1:E2:89:E4:D8:99:09:26:11:7A:DA:3B:DF:EB:41:9C
sig_hashalgo: sha512
[cfg80211]
filename: /lib/modules/3.19.0-32-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: F28307769349A31F4B24FC2
depends:
intree: Y
vermagic: 3.19.0-32-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 0C:8B:EF:E0:C1:E2:89:E4:D8:99:09:26:11:7A:DA:3B:DF:EB:41:9C
sig_hashalgo: sha512
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[b43]
allhwsupport: 0
bad_frames_preempt: 0
btcoex: 1
hwpctl: 0
hwtkip: 0
nohwcrypt: 0
pio: 0
qos: 1
verbose: 2
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
lp
rtc
b43
b43
b43
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist-bcm43.conf]
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
##### rc.local ##########################
exit 0
##### pm-utils ##########################
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x14e4:0x16b5 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x14e4:0x4358 (wl)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 10.043299] bcma: bus0: Found chip with id 43227, rev 0x00 and package 0x08
[ 10.043328] bcma: bus0: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x25, class 0x0)
[ 10.043348] bcma: bus0: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x1E, class 0x0)
[ 10.043384] bcma: bus0: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x12, class 0x0)
[ 10.043402] bcma: bus0: Core 3 found: SDIO Device (manuf 0x4BF, id 0x829, rev 0x07, class 0x0)
[ 10.054329] bcma: bus0: Bus registered
[ 10.068999] b43-phy0: Broadcom 43227 WLAN found (core revision 30)
[ 10.069968] b43-phy0: Found PHY: Analog 9, Type 4 (N), Revision 16
[ 10.069978] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2057, Revision 9, Version 1
[ 10.279533] b43 bcma0:1: Direct firmware load for b43/ucode30_mimo.fw failed with error -2 (repeated 2 times)
[ 10.279586] b43 bcma0:1: Direct firmware load for b43-open/ucode30_mimo.fw failed with error -2 (repeated 2 times)
[ 10.279597] b43-phy0 ERROR: Firmware file "b43/ucode30_mimo.fw" not found
[ 10.279599] b43-phy0 ERROR: Firmware file "b43-open/ucode30_mimo.fw" not found
[ 10.279603] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all instructions on this website.
[ 10.938573] wl: module license 'MIXED/Proprietary' taints kernel.
[ 10.942985] wl: module verification failed: signature and/or required key missing - tainting kernel
[ 14.230775] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 15.760502] tg3 0000:01:00.0 eth0: Link is up at 100 Mbps, full duplex
[ 15.760508] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
[ 15.760510] tg3 0000:01:00.0 eth0: EEE is disabled
[ 15.760534] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
########## wireless info END ############
答案1
BCM43227 显然需要 STA 驱动程序，可以通过
sudo apt-get update
sudo apt-get install --reinstall bcmwl-kernel-source
sudo modprobe -r b43 ssb wl brcmfmac brcmsmac bcma
sudo modprobe wl
这组命令的来源是在该位置