这是我第一次使用 Linux（我使用的是 Ubuntu 12.04），我在连接互联网时遇到了问题。我读了一些帖子，然后做了以下事情，如果有人知道发生了什么，我将不胜感激！！！
我输入了lspci -vvv，结果是：
> 09:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040
> PCI-E Fast Ethernet Controller (rev 13) Subsystem: Dell Device 02aa
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
> Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B-
> ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ
> 45 Region 0: Memory at f68fc000 (64-bit, non-prefetchable) [size=16K]
> Region 2: I/O ports at de00 [size=256] Capabilities: <access denied>
> Kernel driver in use: sky2 Kernel modules: sky2
>
> 0c:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g
> LP-PHY (rev 01) Subsystem: Dell Wireless 1397 WLAN Mini-Card
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
> Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B-
> ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ
> 17 Region 0: Memory at f69fc000 (64-bit, non-prefetchable) [size=16K]
> Capabilities: <access denied> Kernel driver in use: b43-pci-bridge
> Kernel modules: ssb
我输入的sudo lshw -class network结果如下：
> *-network
> description: Network controller
> product: BCM4312 802.11b/g LP-PHY
> vendor: Broadcom Corporation
> physical id: 0
> bus info: pci@0000:0c:00.0
> version: 01
> width: 64 bits
> clock: 33MHz
> capabilities: pm msi pciexpress bus_master cap_list
> configuration: driver=b43-pci-bridge latency=0
> resources: irq:17 memory:f69fc000-f69fffff
*-network
> description: Ethernet interface
> product: 88E8040 PCI-E Fast Ethernet Controller
> vendor: Marvell Technology Group Ltd.
> physical id: 0
> bus info: pci@0000:09:00.0
> logical name: eth0
> version: 13
> serial: 00:23:ae:35:91:e3
> capacity: 100Mbit/s
> width: 64 bits
> clock: 33MHz
> capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
> configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 firmware=N/A latency=0 link=no multicast=yes
> port=twisted pair
> resources: irq:45 memory:f68fc000-f68fffff ioport:de00(size=256)
*-network DISABLED
> description: Wireless interface
> physical id: 2
> logical name: wlan0
> serial: 00:24:2c:20:ce:28
> capabilities: ethernet physical wireless
> configuration: broadcast=yes driver=b43 driverversion=3.2.0-23-generic firmware=N/A link=no multicast=yes
> wireless=IEEE 802.11bg
在这之后我写道rfkill list all
> 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1:
> dell-wifi: Wireless LAN Soft blocked: yes Hard blocked: no
然后lsmod
> Module Size Used by rfcomm 47604 0
> joydev 17693 0 bnep 18281 2
> parport_pc 32866 0 ppdev 17113 0
> bluetooth 180104 10 rfcomm,bnep lp
> 17799 0 parport 46562 3 parport_pc,ppdev,lp dell_wmi
> 12681 0 sparse_keymap 13890 1 dell_wmi dell_laptop
> 18119 0 dcdbas 14490 1 dell_laptop uvcvideo
> 72627 0 videodev 98259 1 uvcvideo snd_hda_codec_idt
> 70795 1 v4l2_compat_ioctl32 17128 1 videodev psmouse
> 87603 0 snd_hda_intel 33773 3 snd_hda_codec
> 127706 2 snd_hda_codec_idt,snd_hda_intel snd_hwdep 13668
> 1 snd_hda_codec arc4 12529 2 serio_raw
> 13211 0 snd_pcm 97188 2 snd_hda_intel,snd_hda_codec
> snd_seq_midi 13324 0 snd_rawmidi 30748 1
> snd_seq_midi b43 365785 0 snd_seq_midi_event
> 14899 1 snd_seq_midi mac80211 506816 1 b43 snd_seq
> 61896 2 snd_seq_midi,snd_seq_midi_event snd_timer 29990
> 2 snd_pcm,snd_seq snd_seq_device 14540 3
> snd_seq_midi,snd_rawmidi,snd_seq cfg80211 205544 2
> b43,mac80211 mac_hid 13253 0 bcma
> 26696 1 b43 snd 78855 15
> snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
> soundcore 15091 1 snd snd_page_alloc 18529 2
> snd_hda_intel,snd_pcm sky2 59043 0 ssb
> 52752 1 b43 i915 468651 3 ums_realtek
> 18248 0 uas 18027 0 wmi
> 19256 1 dell_wmi drm_kms_helper 46978 1 i915 drm
> 242038 4 i915,drm_kms_helper i2c_algo_bit 13423 1 i915
> video 19596 1 i915 usb_storage 49198 1
> ums_realtek
然后ifconfig -a
> eth0 Link encap:Ethernet HWaddr 00:23:ae:35:91:e3
> 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:18
>
> 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:80 errors:0 dropped:0 overruns:0 frame:0
> TX packets:80 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:6560 (6.5 KB) TX bytes:6560 (6.5 KB)
>
> wlan0 Link encap:Ethernet HWaddr 00:24:2c:20:ce:28
> 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)
最后iwconfig
> lo no wireless extensions.
>
> wlan0 IEEE 802.11bg ESSID:off/any
> Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm
> Retry long limit:7 RTS thr:off Fragment thr:off
> Power Management:on
> eth0 no wireless extensions.
我按照“安装 STA 驱动程序”中所述的所有步骤操作，但仍然无法连接到互联网。启用无线连接已勾选，但没有可用的无线网络。请告诉我该怎么办，以便您能帮助我上网。非常感谢您的回复。
答案1
OP 发帖：
我按照https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx#STA%20-%20Internet%20access并且我连接上了，实际上我正在用 Ubuntu 12.04 写这篇文章！！！
我按照“b43 - 无互联网访问”中所述的步骤进行操作。
答案2
我在 ubuntu 15 上。我的旧戴尔 Inspiron 无法识别我的 bcm 4312 14e4 4315 rev01 无线适配器，所以这是唯一有效的方法，但你需要有线连接来安装 b43
首先
Sudo software-properties-gtk
选择所有可用的选项复选框 确保有线连接已插入
Sudo apt-get update
Sudo apt-get install firmware-b43-installer
接下来全部执行
Sudo modprobe -r b43 bcma
Sudo modprobe -r brcmsmac bcma
Sudo modprobe -r wl
可能未找到模块 wl
下一个
Sudo modprobe b43
稍等片刻，然后检查无线活动。我这样做时，飞行模式已打开。我关闭了飞行模式，WiFi 第一次正常工作。这是 ubuntu live usb 设置，所以我需要切换到 b43 而不是重新启动，但我认为它效果更好。无论如何，我更喜欢坚持使用 live 操作系统，如果我要安装操作系统，我只会坚持使用 windows。