我有一台 Acer travilmate。安装 Ubuntu 并连接到无线网络后，我的 Wifi 一直打开和关闭，我几乎无能为力
这真的很烦人，因为它阻止我做任何事情，我几乎没有加载视频或游戏。
有什么方法可以解决这个问题并让 wifi 正常工作？
的结果lspci -nnk | grep -iA2 net：
lspci -nnk | grep -iA2 net
00:1f.3 SMBus [0c05]: Intel Corporation NM10/ICH7 Family SMBus Controller [8086:27da] (rev 02)
Subsystem: Acer Incorporated [ALI] Device [1025:0110]
02:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8038 PCI-E Fast Ethernet Controller [11ab:4352] (rev 14)
Subsystem: Acer Incorporated [ALI] Device [1025:0110]
Kernel driver in use: sky2
03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4222] (rev 02)
Subsystem: Intel Corporation PRO/Wireless 3945BG Network Connection [8086:1005]
Kernel driver in use: iwl3945
0a:09.0 CardBus bridge [0607]: Texas Instruments PCIxx12 Cardbus Controller [104c:8039]
的结果lsmod：
lsmod
Module Size Used by
parport_pc 31981 0
ppdev 17391 0
bnep 18893 2
rfcomm 53664 16
btusb 23443 0
bluetooth 323622 22 bnep,btusb,rfcomm
coretemp 13195 0
joydev 17097 0
acer_wmi 31735 0
sparse_keymap 13708 1 acer_wmi
snd_hda_codec_si3054 12864 1
snd_hda_codec_realtek 45592 1
gspca_vc032x 31199 0
gspca_main 27772 1 gspca_vc032x
videodev 107508 2 gspca_vc032x,gspca_main
snd_hda_intel 42658 3
snd_hda_codec 164003 3 snd_hda_codec_realtek,snd_hda_codec_si3054,snd_hda_intel
arc4 12536 2
snd_hwdep 13272 1 snd_hda_codec
snd_pcm 89488 3 snd_hda_codec_si3054,snd_hda_codec,snd_hda_intel
iwl3945 63619 0
snd_page_alloc 14230 2 snd_pcm,snd_hda_intel
microcode 18830 0
iwlegacy 87971 1 iwl3945
i915 589697 3
snd_seq_midi 13132 0
mac80211 513247 2 iwl3945,iwlegacy
snd_seq_midi_event 14475 1 snd_seq_midi
snd_rawmidi 25094 1 snd_seq_midi
psmouse 90642 0
snd_seq 55383 2 snd_seq_midi_event,snd_seq_midi
pcmcia 51368 0
snd_seq_device 14137 3 snd_seq,snd_rawmidi,snd_seq_midi
cfg80211 401436 3 iwl3945,iwlegacy,mac80211
drm_kms_helper 46867 1 i915
serio_raw 13189 0
snd_timer 24447 2 snd_pcm,snd_seq
drm 242354 4 i915,drm_kms_helper
snd 60790 17 snd_hda_codec_realtek,snd_hda_codec_si3054,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
yenta_socket 40193 0
soundcore 12600 1 snd
pcmcia_rsrc 18319 1 yenta_socket
tifm_7xx1 13163 0
pcmcia_core 22328 3 pcmcia,pcmcia_rsrc,yenta_socket
i2c_algo_bit 13197 1 i915
lpc_ich 16864 0
tifm_core 15040 1 tifm_7xx1
wmi 18590 1 acer_wmi
video 18777 2 i915,acer_wmi
mac_hid 13037 0
lp 13299 0
parport 40795 3 lp,ppdev,parport_pc
hid_generic 12492 0
usbhid 47361 0
hid 87370 2 hid_generic,usbhid
sky2 52910 0
的结果iwconfig：
iwconfig
wlan0 IEEE 802.11bg ESSID:"Etisalat"
Mode:Managed Frequency:2.412 GHz Access Point: C8:D1:5E:5B:CB:2C
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=65/70 Signal level=-45 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:2 Missed beacon:0
lo no wireless extensions.
eth0 no wireless extensions.
的结果ifconfig -a：
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:16:36:9b:da:24
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:16
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:65536 Metric:1
RX packets:1545 errors:0 dropped:0 overruns:0 frame:0
TX packets:1545 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:116454 (116.4 KB) TX bytes:116454 (116.4 KB)
wlan0 Link encap:Ethernet HWaddr 00:18:de:46:aa:77
inet addr:192.168.1.6 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::218:deff:fe46:aa77/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2512 errors:0 dropped:0 overruns:0 frame:0
TX packets:2634 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:892621 (892.6 KB) TX bytes:478504 (478.5 KB)
的结果sudo iwlist scan：
sudo iwlist scan
wlan0 Scan completed :
Cell 01 - Address: C8:D1:5E:5B:CB:2C
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=60/70 Signal level=-50 dBm
Encryption key:on
ESSID:"Etisalat"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000fee9c2e01
Extra: Last beacon: 44ms ago
IE: Unknown: 000845746973616C6174
IE: Unknown: 010882848B961224486C
IE: Unknown: 030101
IE: Unknown: 2A0100
IE: Unknown: 32040C183060
IE: Unknown: 2D1A8C0103FFFF0000000000000000000000000000000C0000000000
IE: Unknown: 3D1601000700000000000000000000000000000000000000
IE: Unknown: 3E0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: DD07000C4307000000
IE: Unknown: 0706454720010D10
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
的结果cat/etc/resolv.conf：
cat/etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTENnameserver 127.0.1.1
答案1
不同的问题可能会导致这种情况
应用程序错误、驱动程序问题、硬件问题（包括过热）、网络干扰、网络注册、您选择的频道等。
首先摆脱手机等干扰设备。
转到Network Connections> Wireless>Edit并将其设置为自动连接。
关闭设备电源进行检查。
sudo iwconfig [INTERFAE]wlan0 power off
[INTERFAE]可能是wlan0或eth0（或 1、2、3 等）
如果没有解决：
安装 wifi 设备驱动程序
sudo apt-get install collectd-core collectd-dev collectd-dbg collectd-utils
并更改应用程序
sudo apt-get install wicd-gtk wicd wicd-daemon wicd-curses wicd-cli
使用 Wicd，将频道更改为 6。
如果尚未解决，请编辑问题并包括lspci -nnk | grep -iA2 net、lsmod、iwconfig、ifconfig -a、的结果。具有专业知识的人可能会提供帮助。sudo iwlist scancat /etc/resolv.conf