Ubuntu 12.04戴尔6400没有网络
我刚刚安装了Ubuntu 12.04。 我的网络无法正常工作：没有无线网络，没有有线网络。 关于它的论坛上有一些post，但是我无法解决它。 可以使用键盘组合Fn + F2关闭笔记本电脑上的无线function，但如何检查它是否正在运行？
我找到了一个带有命令的post，可以提供有关此问题的一些信息。 请帮忙，我无法修复它。
marta@martaPC:~$ lspci 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (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-M Family) SATA Controller [IDE mode] (rev 01) 00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01) 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) marta@martaPC:~$ lsusb Bus 003 Device 002: ID 1bcf:053a Sunplus Innovation Technology Inc. Targa Silvercrest OMC807-C optische Funkmaus Bus 005 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth) Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 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 005 Device 003: ID 413c:8126 Dell Computer Corp. Wireless 355 Bluetooth Bus 005 Device 004: ID 0a5c:4502 Broadcom Corp. Keyboard (Boot Interface Subclass) Bus 005 Device 005: ID 0a5c:4503 Broadcom Corp. Mouse (Boot Interface Subclass) marta@martaPC:~$ ifconfig 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:912 errors:0 dropped:0 overruns:0 frame:0 TX packets:912 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:75104 (75.1 KB) TX bytes:75104 (75.1 KB) marta@martaPC:~$ iwconfig lo no wireless extensions. marta@martaPC:~$ sudo lshw -C network [sudo] password for marta: *-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=wl latency=0 resources: irq:16 memory:efdfc000-efdfffff *-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 marta@martaPC:~$ lsb_release -d Description: Ubuntu 12.04.2 LTS marta@martaPC:~$ uname -mr 3.5.0-23-generic i686 请删除不正确的驱动程序：
sudo apt-get remove --purge bcmwl-kernel-source
现在加载由bcmwl驱动程序列入黑名单的以太网驱动程序：
sudo modprobe b44
现在你的以太网应该正常工作。 获取临时以太网连接并执行：
sudo apt-get install linux-firmware-nonfree
重新启动，一切都应按预期工作。