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无线检测网络但未连接 - ubuntu 12.04

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无线检测网络但未连接 - ubuntu 12.04

我有一台运行 ubuntu 12.04 的戴尔 Inspiron M301Z。在我重新安装它之前，它运行良好。安装期间它运行良好，但当我通过更新管理器下载更新时，连接断开。现在它一直尝试连接到网络，但每次都失败。连接在 Windows 上正常工作。在附加驱动程序中，它显示 Broadcom STA 无线驱动程序已激活。

sudo lshw -C network
  *-network               
       description: Wireless interface
       product: BCM4313 802.11b/g/n Wireless LAN Controller
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth1
       version: 01
       serial: c4:46:19:95:cf:08
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.20.155.1 (r326264) latency=0 multicast=yes wireless=IEEE 802.11abg
       resources: irq:17 memory:d0300000-d0303fff
  *-network
       description: Ethernet interface
       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: eth0
       version: 04
       serial: 00:26:b9:70:33:62
       size: 100Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=N/A ip=192.168.2.4 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:43 ioport:a000(size=256) memory:d0004000-d0004fff memory:d0000000-d0003fff



rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: brcmwl-0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
3: dell-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
4: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

我读过这里的几篇帖子，尝试过一些方法，但都没有效果。

谢谢

答案1

可能是 DNS 问题？

您是否已编辑

/etc/NetworkManger/NetworkManager.conf

或者

/etc/network/interfaces

当我禁用 iPv6 并编辑 /etc/network/interfaces 以包含以下内容时，我的 12.04 wifi 问题得到了解决

auto lo
iface lo inet loopback

（不必删除其他所有内容，只需##注释掉即可。）

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