我正在使用 WPA2 对网络进行身份验证，但它不起作用（它进行身份验证后关闭）
- 操作系统：Ubuntu 13.04
- 无线网卡：Intel Corporation Ultimate N WiFi Link 5300
$ dmesg:
[ 1248.966666] wlan0: authenticate with 00:20:a6:bb:ff:e1
[ 1248.969571] wlan0: send auth to 00:20:a6:bb:ff:e1 (try 1/3)
[ 1248.986155] wlan0: authenticated
[ 1248.986417]iwlwifi 0000:02:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[ 1248.986425] iwlwifi 0000:02:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[ 1248.988049] wlan0: associate with 00:20:a6:bb:ff:e1 (try 1/3)
[ 1248.990384] wlan0: RX AssocResp from 00:20:a6:bb:ff:e1 (capab=0x31 status=0 aid=1)
[ 1248.995162] wlan0: associated
[ 1251.042674] wlan0: disassociating from 00:20:a6:bb:ff:e1 by local choice (reason=3)
[ 1251.201126] cfg80211: Calling CRDA to update world regulatory domain
[ 1251.201392] wlan0: deauthenticating from 00:20:a6:bb:ff:e1 by local choice (reason=3)
[ 1251.209426] cfg80211: World regulatory domain updated:
[ 1251.209433] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1251.209438] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1251.209442] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1251.209446] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1251.209450] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1251.209453] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
root@jafa:~#
$Lshw
*-network
description: Wireless interface
product: Ultimate N WiFi Link 5300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 00
serial: 00:21:6a:93:b4:48
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.8.0-21-generic firmware=8.83.5.1 build 33692 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
resources: irq:47 memory:f4200000-f4201fff
$ iwlist wlan0 genie
wlan0 no generic IE (Operation not supported).
$ sudo iwlist wlan0 encryption
[sudo] password for josimar:
wlan0 2 key sizes : 40, 104bits
4 keys available :
[1]: off
[2]: off
[3]: off
[4]: off
Current Transmit Key: [1]
$ lsusb
02:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300
Subsystem: Intel Corporation Device 1101
Flags: bus master, fast devsel, latency 0, IRQ 47
Memory at f4200000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-21-6a-ff-ff-93-b4-48
Kernel driver in use: iwlwifi
$ lsmod
Module Size Used by
pci_stub 12550 1
vboxpci 22896 0
vboxnetadp 25636 0
vboxnetflt 27261 0
vboxdrv 285137 3 vboxnetadp,vboxnetflt,vboxpci
parport_pc 27504 0
ppdev 12817 0
bnep 17669 2
rfcomm 37420 0
bluetooth 202069 10 bnep,rfcomm
snd_hda_codec_realtek 63791 1
binfmt_misc 17260 1
uvcvideo 71279 0
videobuf2_vmalloc 12920 1 uvcvideo
videobuf2_memops 13042 1 videobuf2_vmalloc
videobuf2_core 39161 1 uvcvideo
videodev 95806 2 uvcvideo,videobuf2_core
joydev 17097 0
arc4 12543 2
iwldvm 220185 0
mac80211 526519 1 iwldvm
coretemp 13131 0
snd_hda_intel 38307 5
snd_hda_codec 117580 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13272 1 snd_hda_codec
snd_pcm 80890 3 snd_hda_codec,snd_hda_intel
snd_page_alloc 14230 2 snd_pcm,snd_hda_intel
snd_seq_midi 13132 0
snd_seq_midi_event 14475 1 snd_seq_midi
snd_rawmidi 25114 1 snd_seq_midi
iwlwifi 155077 1 iwldvm
i915 535507 4
drm_kms_helper 47545 1 i915
snd_seq 51280 2 snd_seq_midi_event,snd_seq_midi
microcode 18286 0
cfg80211 436177 3 iwlwifi,mac80211,iwldvm
drm 228750 5 i915,drm_kms_helper
snd_seq_device 14137 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 24411 2 snd_pcm,snd_seq
psmouse 81038 0
serio_raw 13031 0
lpc_ich 16925 0
i2c_algo_bit 13197 1 i915
wmi 18590 0
snd 56485 18 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device
jmb38x_ms 17177 0
memstick 15842 1 jmb38x_ms
soundcore 12600 1 snd
video 18894 1 i915
mac_hid 13037 0
lp 13299 0
parport 40753 3 lp,ppdev,parport_pc
hid_generic 12484 0
usbhid 41805 0
hid 82666 2 hid_generic,usbhid
firewire_ohci 35292 0
sdhci_pci 18158 0
ahci 25507 4
sdhci 31824 1 sdhci_pci
firewire_core 61718 1 firewire_ohci
libahci 26108 1 ahci
r8169 61531 0
crc_itu_t
答案1
升级到 13.04 后大约一周我遇到了同样的问题。
发现相关错误在 Launchpad 上。
请告诉 Launchpad 该错误影响了您！:)
解决方法如下： 如何连接到 wpa2 enterprise mschapv2？
消除
system-ca-cert=true
从配置文件中找到/etc/NetworkManager/system-connections/
删除这个之后，无线就可以恢复了！
答案2
system-ca-certs=true这已经是相当老的问题了，但我也遇到了类似的问题，而且我的网络配置中也没有这行。我通过发出以下命令暂时解决了该问题
killall wpa-supplicant
我不知道为什么这样做有效，但确实有效。这个答案来自这里，但几乎没有解释。