决定减少家中的杂乱，并使用 USB 网络设备 Rosewill RNX-X1 将我妻子的系统上的有线连接替换为无线连接。我可以看到并连接到不受保护的网络，但 WPA2 身份验证反复失败。尝试使用 Linksys USB 网络适配器进行同样的操作。两者都无法进行身份验证。
值得注意的是，我最近从 Comcast 切换到 CenturyLink，因此也切换了路由器。系统使用 WPA2 成功连接到之前的路由器 (Linksys EA4500)。我以为是路由器 (Actiontec C1000A) 的问题，但所有其他设备 (电视、iPad、Windows、Blackberry 和 Squeezebox) 都连接正常。
希望得到一些诊断指导和见解。以下是线程中建议的分析脚本的结果http://ubuntuforums.org/showpost.php?p=10564143&postcount=7
pci 无线设备
USB 无线设备
Bus 001 Device 010: ID 148f:2870 Ralink Technology, Corp. RT2870 Wireless Adapter
网络设备列表
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 01
serial: 00:e0:4d:30:40:a1
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=N/A latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:47 ioport:ac00(size=256) memory:fdcff000-fdcfffff memory:fdb00000-fdb1ffff
*-network
description: Wireless interface
physical id: 1
bus info: usb@1:2
logical name: wlan1
serial: 00:02:6f:bd:30:a0
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rt2800usb driverversion=3.2.0-31-generic firmware=0.29 link=yes multicast=yes wireless=IEEE 802.11bgn
司机名单
Module Size Used by
rndis_wlan 28472 0
rndis_host 13560 1 rndis_wlan
cdc_ether 13312 1 rndis_host
usbnet 25214 3 rndis_wlan,rndis_host,cdc_ether
bnep 17830 2
parport_pc 32114 0
rfcomm 38139 0
bluetooth 158438 10 bnep,rfcomm
ppdev 12849 0
vesafb 13516 1
binfmt_misc 17292 1
snd_hda_codec_hdmi 31775 1
snd_hda_codec_realtek 174313 1
nvidia 10962290 30
snd_usb_audio 101566 1
snd_usbmidi_lib 24603 1 snd_usb_audio
arc4 12473 2
snd_hda_intel 32765 3
snd_hda_codec 109562 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_seq_midi 13132 0
snd_rawmidi 25424 2 snd_usbmidi_lib,snd_seq_midi
uvcvideo 67203 0
videodev 86588 1 uvcvideo
snd_hwdep 13276 2 snd_usb_audio,snd_hda_codec
snd_seq_midi_event 14475 1 snd_seq_midi
rt2800usb 22300 0
rt2800lib 53264 1 rt2800usb
crc_ccitt 12595 1 rt2800lib
rt2x00usb 20061 1 rt2800usb
rt2x00lib 48805 3 rt2800usb,rt2800lib,rt2x00usb
mac80211 436455 3 rt2800lib,rt2x00usb,rt2x00lib
cfg80211 178679 3 rndis_wlan,rt2x00lib,mac80211
snd_pcm 80845 4 snd_hda_codec_hdmi,snd_usb_audio,snd_hda_intel,snd_hda_codec
snd_seq 51567 2 snd_seq_midi,snd_seq_midi_event
psmouse 96619 0
serio_raw 13027 0
i2c_nforce2 12906 0
k8temp 12905 0
snd_timer 28931 2 snd_pcm,snd_seq
snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq
snd_page_alloc 14115 2 snd_hda_intel,snd_pcm
snd 62064 20 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_usb_audio,snd_usbmidi_lib,snd_hda_intel,snd_hda_codec,snd_rawmidi,snd_hwdep,snd_pcm,snd_seq,snd_timer,snd_seq_device
soundcore 14635 1 snd
wmi 18744 0
mac_hid 13077 0
lp 17455 0
parport 40930 3 parport_pc,ppdev,lp
usbhid 41906 0
hid 77367 1 usbhid
r8169 56321 0
pata_amd 13750 0
网络信息
eth0 Link encap:Ethernet HWaddr 00:e0:4d:30:40:a1
inet6 addr: fe80::2e0:4dff:fe30:40a1/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:174441 errors:0 dropped:0 overruns:0 frame:0
TX packets:125781 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:147560093 (147.5 MB) TX bytes:20180051 (20.1 MB)
Interrupt:47 Base address:0x8000
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:16436 Metric:1
RX packets:14810 errors:0 dropped:0 overruns:0 frame:0
TX packets:14810 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1474361 (1.4 MB) TX bytes:1474361 (1.4 MB)
wlan1 Link encap:Ethernet HWaddr 00:02:6f:bd:30:a0
inet6 addr: fe80::202:6fff:febd:30a0/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:148 errors:0 dropped:0 overruns:0 frame:0
TX packets:148 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:19980 (19.9 KB) TX bytes:22940 (22.9 KB)
无线特定网络信息
lo no wireless extensions.
eth0 no wireless extensions.
wlan1 IEEE 802.11bgn ESSID:"Youtz Family"
Mode:Managed Frequency:2.412 GHz Access Point: 20:76:00:86:7D:84
Bit Rate:6.5 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=56/70 Signal level=-54 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:6 Invalid misc:2 Missed beacon:0
Wed Oct 3 17:51:32 CDT 2012
希望了解如何追查此事。