可能重复：
如何安装 BCM4312 无线驱动程序？
我最近在 Dell™ Inspiron E1505 笔记本电脑上安装了 Ubuntu 11.04 以与 Windows XP 进行双启动。不幸的是，我只能在 Windows 中连接到我们的无线网络。在 Ubuntu 中，除非我将其物理连接到我们的电缆调制解调器，否则我无法上网。
我还是新手，以下是我在网上搜索到的信息。这是我的硬件：
kalayaan001@Kalayaan-MM061:~$ lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev 01)
00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X1400
03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller
03:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
03:01.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
03:01.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
0b:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
我还检查了网络管理器的状态：
kalayaan001@Kalayaan-MM061:~$ nm-applet
An instance of nm-applet is already running.
** (nm-applet:1727): WARNING **: <WARN> constructor(): Couldn't initialize the D-Bus manager.
我们如何初始化 D-Bus 管理器？
kalayaan001@Kalayaan-MM061:~$ nm-tool
NetworkManager Tool
State: disconnected
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: b44
State: unavailable
Default: no
HW Address: 00:19:B9:85:01:CA
Capabilities:
Carrier Detect: yes
Speed: 10 Mb/s
Wired Properties
Carrier: off
好像它只能检测到有线网络的设备。如何让它识别无线设备？
然后我检查了块，但没有找到。
kalayaan001@Kalayaan-MM061:~$ rfkill list
0: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
因此，我认为这是一个驱动程序问题，果然，我在“附加驱动程序”中发现缺少 Broadcom® STA 无线驱动程序。不幸的是，获取驱动程序也无法解决问题。它仍然无法检测到任何东西。
如何修复？
”ר_ 请帮忙！_ΓL
感谢您的时间。
保重，Kalayaan 001
回复 sagarchalise：
我安装了关键字“bcm4311”下的所有 4 个条目：firmware-b43-installer、bcmwl-kernel-source、broadcom-sta-common 和 broadcom-sta-source。（甚至还有 b43-fwcutter，尽管它出现在更广泛的关键字“bcm”中。）问题仍然存在。
附加驱动程序报告：“此驱动程序已激活并且当前正在使用中。”
这是 ifconfig：
kalayaan001@Kalayaan-MM061:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:19:b9:85:01:ca
UP 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)
Interrupt:17
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:12 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:720 (720.0 B) TX bytes:720 (720.0 B)
这是 iwconfig：
kalayaan001@Kalayaan-MM061:~$ iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
我如何获得这些扩展？
在此过程中，2段代码的结果似乎发生了变化：
1）nm工具
kalayaan001@Kalayaan-MM061:~$ nm-tool
NetworkManager Tool
“工具”之后的所有内容都消失了。
2） sudo lshw -C network 之前：
kalayaan001@Kalayaan-MM061:~$ sudo lshw -C network
[sudo] password for kalayaan001:
*-network
description: Network controller
product: BCM4311 802.11b/g WLAN
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:0b:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=b43-pci-bridge latency=0
resources: irq:16 memory:efcfc000-efcfffff
*-network
description: Ethernet interface
product: BCM4401-B0 100Base-TX
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 02
serial: 00:19:b9:85:01:ca
size: 10Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=half latency=64 link=no multicast=yes port=twisted pair speed=10Mbit/s
resources: irq:17 memory:ef9fe000-ef9fffff
后：
kalayaan001@Kalayaan-MM061:~$ sudo lshw -C network
[sudo] password for kalayaan001:
*-network
description: Network controller
product: BCM4311 802.11b/g WLAN
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:0b:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=b43-pci-bridge latency=0
resources: irq:16 memory:efcfc000-efcfffff
*-network
description: Ethernet interface
product: BCM4401-B0 100Base-TX
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 02
serial: 00:19:b9:85:01:ca
size: 10Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=half latency=64 link=no multicast=yes port=twisted pair speed=10Mbit/s
resources: irq:17 memory:ef9fe000-ef9fffff
后：
kalayaan001@Kalayaan-MM061:~$ sudo lshw -C network
[sudo] password for kalayaan001:
*-network UNCLAIMED
description: Network controller
product: BCM4311 802.11b/g WLAN
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:0b:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: memory:efcfc000-efcfffff
*-network UNCLAIMED
description: Ethernet controller
product: BCM4401-B0 100Base-TX
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: latency=64
resources: memory:ef9fe000-ef9fffff
在 Ubuntu 代码中，“UNCLAIMED”是什么意思？
我尝试了网站上建议的代码。不幸的是，没有效果。我会在早上再试一次（在我的时区已经过了睡觉时间。所以我正要睡觉。）
还有其他建议吗？
再次感谢您的时间。非常感谢您的回复。
小心，
卡拉延001
答案1
基本上检查附加驱动程序部分是否正在使用。
尝试ifconfig或iwconfig查看您是否有无线接口。有时，如果附加驱动程序推荐失败，您可能需要安装替代的 Broadcom 驱动程序。尝试Synaptic Package Manager使用搜索关键字的不同 Broadcom 选项bcm4311。或者按照更多说明操作这里。