我刚刚在我的戴尔 inspiron 5520 上安装了 Lubuntu 14.04。但是就像新操作系统经常发生的情况一样，现在我没有 wifi。我只能使用以太网连接来连接互联网。我还查看了戴尔的网站，他们没有这款笔记本电脑的 Ubuntu 驱动程序。
无线脚本输出：
########## wireless info START ##########
Report from: 10 Apr 2015 19:44 IST +0530
Booted last: 11 Apr 2015 00:25 IST +0530
Script from: 20 Sep 2014 23:04 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
##### kernel ############################
Linux 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Lubuntu
##### lspci #############################
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)
Subsystem: Dell Device [1028:056a]
Kernel driver in use: r8169
08:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]
Kernel driver in use: bcma-pci-bridge
##### lsusb #############################
Bus 002 Device 017: ID 0a5c:21d7 Broadcom Corp. BCM43142 Bluetooth 4.0
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
'pccardctl' is not installed (package "pcmciautils").
##### rfkill ############################
5: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
##### lsmod #############################
dell_wmi 12761 0
sparse_keymap 13948 1 dell_wmi
dell_laptop 18168 0
bcma 52320 0
dcdbas 14928 1 dell_laptop
wmi 19193 1 dell_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr d4:be:d9:32:70:ff
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::d6be:d9ff:fe32:70ff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:97569 errors:0 dropped:0 overruns:0 frame:0
TX packets:60735 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:130859069 (130.8 MB) TX bytes:5258823 (5.2 MB)
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
##### resolv.conf #######################
nameserver 127.0.1.1
##### nm-tool ###########################
NetworkManager Tool
State: connected (global)
- Device: eth0 [Wired connection 1] -------------------------------------------
Type: Wired
Driver: r8169
State: connected
Default: yes
HW Address: D4:BE:D9:32:70:FF
Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s
Wired Properties
Carrier: on
IPv4 Settings:
Address: 192.168.1.2
Prefix: 24 (255.255.255.0)
Gateway: 192.168.1.1
DNS: 192.168.1.1
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
no-auto-default=D4:BE:D9:32:70:FF,
[ifupdown]
managed=false
##### NetworkManager profiles ###########
##### iw reg get ########################
'iw' is not installed (package "iw").
##### iwlist channels ###################
eth0 no frequency information.
lo no frequency information.
##### iwlist scan #######################
答案1
您可以重新安装网络管理器并进行适当的更新以进行首次调查。您也可以重新启动服务网络管理器！
/etc/init.d/network-manager 重新启动