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Ubuntu 17.10 上未显示 Wi-Fi 网络列表

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Ubuntu 17.10 上未显示 Wi-Fi 网络列表

我有一台戴尔 Latitude d620，我在其上运行 Windows 7 和 Ubuntu 17.10。但我发现每当我登录 Ubuntu 时，它都无法找到任何网络。它总是无限搜索，这与我登录 Windows 时的情况不同。我浏览过很多帖子，但他们的答案似乎没有帮助。我将发布我在下面运行的代码列表及其结果。

sudo lshw -C network

*-network                 
       description: Wireless interface
       product: PRO/Wireless 3945ABG [Golan] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:0c:00.0
       logical name: wlp12s0
       version: 02
       serial: 00:19:d2:49:fc:6f
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwl3945 driverversion=4.13.0-38-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:24 memory:efdff000-efdfffff
  *-network DISABLED
       description: Ethernet interface
       product: NetXtreme BCM5752 Gigabit Ethernet PCI Express
       vendor: Broadcom Limited
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: enp9s0
       version: 02
       serial: 00:18:8b:a6:60:41
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 firmware=5752-v3.19 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:18 memory:efcf0000-efcfffff

我试过

iwlist wlan0 scan

但它说

wlan0     Interface doesn't support scanning.

我试过：

iwconfig

结果

wlp12s0   IEEE 802.11  ESSID:off/any  
      Mode:Managed  Access Point: Not-Associated   Tx-Power=15 dBm   
      Retry short limit:7   RTS thr:off   Fragment thr:off
      Power Management:off

lo        no wireless extensions.

enp9s0    no wireless extensions.

我试过这个

lspci | grep -i -E wireless\|ethernet

并得到这个

    09:00.0 Ethernet controller: Broadcom Limited NetXtreme BCM5752 Gigabit Ethernet PCI Express (rev 02). 
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)

这也是：

sudo iwlist wlp12s0 s

总是能看到一些网络，但不会显示在 GUI 中

wlp12s0   Scan completed :
      Cell 01 - Address: A4:BA:76:74:97:EA
                Channel:6
                Frequency:2.437 GHz (Channel 6)
                Quality=64/70  Signal level=-46 dBm  
                Encryption key:off
                ESSID:"Xender_APd5dc"
                Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                          24 Mb/s; 36 Mb/s; 54 Mb/s
                Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                Mode:Master
                Extra:tsf=0000000001b34f0d
                Extra: Last beacon: 28ms ago
                IE: Unknown: 000D58656E6465725F415064356463
                IE: Unknown: 010882848B962430486C
                IE: Unknown: 030106
                IE: Unknown: 0706555320010B1E
                IE: Unknown: 200100
                IE: Unknown: 23021300
                IE: Unknown: 2A0100
                IE: Unknown: 32040C121860
                IE: Unknown: 2D1A200017FF00000000000000000000000000000000000000000000
                IE: Unknown: 3D1606080000000000000000000000000000000000000000
                IE: Unknown: 7F0104
                IE: Unknown: DD090010180200000C0000
                IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00

请帮帮我，我已经为此烦恼了好几个星期了。

cat /etc/NetworkManager/NetworkManager.conf

结果如下：

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=no

对于第二条命令

cat /etc/network/interfaces

结果如下：

/etc/network/interfaces -- configuration file for 
ifup(8), ifdown(8)
 Generated by debian-installer.  

 The loopback interface
 auto lo
 iface lo inet loopback

我还注意到，只要网络可用，我的电脑就会连接到我在安装过程中设置的网络。这是我手机上的无线网络。但它甚至不会显示该网络或其他网络的名称。但我的手机总是告诉我笔记本电脑何时连接到其热点。所以除了具有该名称和密码的 WiFi 网络外，我无法使用任何其他 WiFi 网络。 我需要帮助 ::，

答案1

网络管理器就是问题所在，它让我痛苦了 6 个月。我通过运行以下代码解决了这个问题：

sudo apt-get install wicd

sudo service network-manager stop

sudo service wicd start

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