标签：nal sub dmesg ssi 打开 failed add pac network
1、检查设备状态
$ lspci -k
06:00.0 Network controller: Intel Corporation WiFi Link 5100
Subsystem: Intel Corporation WiFi Link 5100 AGN
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
检查设备驱动是否已经加载
2、检查内核中的固件信息
$ dmesg | grep firmware
[ 7.148259] iwlwifi 0000:02:00.0: loaded firmware version 39.30.4.1 build 35138 op_mode iwldvm
有类似的输出，说明固件正常
3、无线网络管理
获取接口名
$ iw dev
phy#0
Interface wlan0
ifindex 3
wdev 0x1
addr 12:34:56:78:9a:bc
type managed
channel 1 (2412 MHz), width: 40 MHz, center1: 2422 MHz
检查连接状态，未连接时，可以看到
$ iw dev wlan0 link
Not connected.
连接到 AP 后可以看到
$ iw dev wlan0 link
Connected to 12:34:56:78:9a:bc (on wlan0)
SSID: MyESSID
freq: 2412
RX: 33016518 bytes (152703 packets)
TX: 2024638 bytes (11477 packets)
signal: -53 dBm
tx bitrate: 150.0 MBit/s MCS 7 40MHz short GI
bss flags: short-preamble short-slot-time
dtim period: 1
beacon int: 100
获取统计数据
$ iw dev wlan0 station dump
Station 12:34:56:78:9a:bc (on wlan0)
inactive time: 1450 ms
rx bytes: 24668671
rx packets: 114373
tx bytes: 1606991
tx packets: 8557
tx retries: 623
tx failed: 1425
signal: -52 dBm
signal avg: -53 dBm
tx bitrate: 150.0 MBit/s MCS 7 40MHz short GI
authorized: yes
authenticated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
4、激活内核接口
# ip link set wlan0 up
如果出现错误 RTNETLINK answers: Operation not possible due to RF-kill, 请确保硬件开关已经打开。参阅 #Rfkill 警告
要验证接口确实打开
# ip link show wlan0
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state DOWN mode DORMANT group default qlen 1000
link/ether 12:34:56:78:9a:bc brd ff:ff:ff:ff:ff:ff
<BROADCAST,MULTICAST,UP,LOWER_UP> 中的UP 显示接口已经打开
参考链接：https://wiki.archlinux.org/index.php/Wireless_network_configuration_(%E7%AE%80%E4%BD%93%E4%B8%AD%E6%96%87)
标签：nal sub dmesg ssi 打开 failed add pac network
原文地址：http://www.cnblogs.com/flymeng/p/7215922.html
