我对 Ubuntu 和 Linux 还很陌生，尽管几年前我在其他平台上有过一些计算机经验。我最近从一台不再使用的旧戴尔 Inspiron 笔记本电脑上删除了 Windows Vista，并在其上安装了 Ubuntu 14.04.3 桌面版（32 位）。如果我能顺利运行，我打算也转换我日常工作的笔记本电脑。问题是 Ubuntu 14.04.3 LTS 无法识别我的无线网卡（它是旧戴尔自带的 Broadcom 1390）。我看到了关于此问题的多个其他问题，并尝试了其中大约 10 个问题中建议的解决方案，但都没有奏效（一些终端命令返回链接过期、软件不再存在于我的版本中等错误）。
一些链接确实引用了一个脚本来收集系统的网络信息，以便其他人可以建议我如何找到并安装适用于我的 mini-PCI 无线网卡的正确设备驱动程序。 （请注意，我是用旧笔记本电脑通过以太网线直接连接到路由器来发布这篇文章的。我很快就需要切换到 wifi，因此提出这个请求。）我将复制以下内容无线信息.txt这里： *
########## wireless info START ##########
Report from: 26 Sep 2015 16:46 PDT -0700
Booted last: 26 Sep 2015 15:47 PDT -0700
Script from: 14 Jul 2015 17:04 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
##### kernel ############################
Linux 3.19.0-28-generic #30~14.04.1-Ubuntu SMP Tue Sep 1 09:33:32 UTC 2015 i686 i686 i686 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
09:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express [14e4:1713] (rev 02)
Subsystem: Dell Inspiron 1420 [1028:01f3]
Kernel driver in use: tg3
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)
Subsystem: Dell Wireless 1390 WLAN Mini-Card [1028:0007]
Kernel driver in use: wl
##### lsusb #############################
Bus 002 Device 002: ID 05a9:2640 OmniVision Technologies, Inc. OV2640 Webcam
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
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
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
##### PCMCIA card info ##################
##### rfkill ############################
##### lsmod #############################
dell_wmi 16384 0
sparse_keymap 16384 1 dell_wmi
dell_laptop 16384 0
dcdbas 16384 1 dell_laptop
wl 6148096 1
cfg80211 450560 1 wl
wmi 20480 1 dell_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
inet addr:192.168.1.117 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::<IP6 'eth0' [IF]>/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:29320 errors:0 dropped:0 overruns:0 frame:0
TX packets:18707 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:35350100 (35.3 MB) TX bytes:2063099 (2.0 MB)
Interrupt:17
##### iwconfig ##########################
lo no wireless extensions.
eth0 no wireless extensions.
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
192.168.1.0 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 748 1 0 15:46 ? 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: 192.168.1.117
Prefix: 24 (255.255.255.0)
Gateway: 192.168.1.1
DNS: 192.168.0.1
DNS: 192.168.1.1
##### 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=Beldin76
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: America/Los_Angeles (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 ###################
lo no frequency information.
eth0 no frequency information.
##### iwlist scan #######################
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
##### module infos ######################
modinfo: ERROR: Module wl not found.
[wl]
[cfg80211]
filename: /lib/modules/3.19.0-28-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: F28307769349A31F4B24FC2
depends:
intree: Y
vermagic: 3.19.0-28-generic SMP mod_unload modversions 686
signer: Magrathea: Glacier signing key
sig_key: 33:8B:B9:17:DF:9C:4F:70:3C:FC:37:87:18:3A:7E:6D:F3:BA:BD:3E
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 #################
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
lp
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/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 0x14e4:0x1713 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
##### dmesg #############################
[ 16.679573] [<f9bcd7f1>] wl_pci_probe+0x371/0x730 [wl]
[ 16.680005] [<f8b1c073>] wl_module_init+0x73/0x1000 [wl]
[ 16.680005] EIP: [<f9bd52a1>] wdev_priv.part.9+0x3/0x5 [wl] SS:ESP 0068:f47a9bac
########## wireless info END ############
*
答案1
经过进一步的研究，我找到了一个对我有用的解决方案，它来自于这个问题上最受欢迎的答案（由 Luis Alvarado 回答）安装 Broadcom 无线驱动程序。
具体来说，我全新安装了 Ubuntu 14.04.3 Desktop，以消除我过去尝试无线连接时出现的所有错误。然后，我按照步骤 1 中的建议在终端中运行以下代码：
lspci -nn -d 14e4:
这告诉我我的无线网卡的 PCI ID 是[14e4:4311]（修订版 01）。查看步骤 3 中的 Broadcom 无线表，我发现我需要固件-b43-安装程序然后在终端中运行：
sudo apt-get update
其次是：
sudo update-pciids
按照步骤 2 中的建议进行操作。然后我通过反复试验发现，我必须在终端中运行以下命令：
sudo apt-get purge bcmwl-kernel-source
按照步骤 1 末尾的建议，尽管我没有手动安装bcmwl-内核源代码包。
然后我从步骤 3 在终端中运行以下命令：
sudo apt-get install firmware-b43-installer
然后关闭电脑并拔掉笔记本电脑上的以太网电缆。启动笔记本电脑并登录 Ubuntu 后，网络菜单检测到无线网络，我能够选择自己的网络并成功登录。