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T400 无线适配器不工作

tag-icon • tag-icon 12.04 wireless lenovo thinkpad adapter
T400 无线适配器不工作

每次启动 Ubuntu 12.04 后，我的 Thinkpad T400 上的无线网卡wlan0都能工作一小段时间。但过了一段时间，大概一个小时后，它就开始不工作了。下面是我运行以下命令的输出https://help.ubuntu.com/community/WifiDocs/WirelessTroubleShootingGuide和https://help.ubuntu.com/community/WifiDocs/WirelessTroubleShootingGuide/Drivers 和https://help.ubuntu.com/12.04/ubuntu-help/net-wireless-troubleshooting.html

我想知道问题可能是什么，解决办法是什么？谢谢。

$ nm-tool

- Device: wlan0 ----------------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            iwlwifi
  State:             disconnected
  Default:           no
  HW Address:        

  Capabilities:

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points 

$ lshw -C network

  *-network
       description: Wireless interface
       product: PRO/Wireless 5100 AGN [Shiloh] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 00
       serial:
       width: 64 bits
       clock: 33MHz
       capabilities: cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-60-generic-pae firmware=8.83.5.1 build 33692 latency=0 multicast=yes wireless=IEEE 802.11abgn
       resources: irq:48 memory:f4200000-f4201fff

$ lsmod | grep iwlwifi
iwlwifi               362337  0 
mac80211              436493  4 rt2800lib,rt2x00usb,rt2x00lib,iwlwifi
cfg80211              178877  3 rt2x00lib,iwlwifi,mac80211

$ iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

eth0      no wireless extensions.

$ sudo iwlist scan
lo        Interface doesn't support scanning.

wlan0     Interface doesn't support scanning : Input/output error

eth0      Interface doesn't support scanning.

$ rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

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