联想T431s和无线性能不佳

我刚刚对联想T431s拆箱并安装了ubuntu 12.04.2。一切都进行得很顺利，但是无线技术却从未出现过。我在有线连接上使用NM正确拉出了dhcp，但ifconfig什至根本不显示wlan0。

我在网上浏览了一下，最终从intel网站下载了linux固件，但是检查了md5sum与/lib/firmware它们是否匹配的文件。

如果可以帮助其他人，我很乐意发布其他命令的输出，但是下面列出了lspci和lshw。

jth@t431s:~$ sudo lspci -nnkv | grep -A 10 Centrino
03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6235 [8086:088f] (rev 24)
        Subsystem: Intel Corporation Device [8086:5260]
        Flags: bus master, fast devsel, latency 0, IRQ 10
        Memory at f0c00000 (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 08-d4-0c-ff-ff-00-03-ed

jth@t431s:~$ sudo lshw -C network
  *-network               
       description: Ethernet interface
       product: 82579LM Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: eth0
       version: 04
       serial: 3c:97:0e:92:d6:a1
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=2.0.0-k duplex=full firmware=0.13-3 ip=166.100.1.128 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:42 memory:f1500000-f151ffff memory:f153b000-f153bfff ioport:4080(size=32)
  *-network UNCLAIMED
       description: Network controller
       product: Centrino Advanced-N 6235
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 24
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: memory:f0c00000-f0c01fff

根据第一条评论，上述命令的输出（modprobe没有输出）：

jth@t431s:~$ sudo modprobe iwlwifi
jth@t431s:~$ dmesg | grep iwl
[    2.713720] iwlwifi: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[    2.713723] iwlwifi: Copyright(c) 2003-2012 Intel Corporation
jth@t431s:~$ rfkill list all
0: tpacpi_bluetooth_sw: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
jth@t431s:~$ 

jth@t431s:~$ modinfo iwlwifi | grep 088F
alias:          pci:v00008086d0000088Fsv*sd00004260bc*sc*i*
jth@t431s:~$ 

所需命令的完整输出可在此处找到

运行的命令是：

jth@t431s:~$ dmesg > justin.txt
jth@t431s:~$ lsmod >> justin.txt
jth@t431s:~$ cat /var/log/syslog | grep iwl >> justin.txt