lspci：
Oct 19 13:49:57 linux NetworkManager[850]: <info> NetworkManager state is now CONNECTED_GLOBAL
Oct 19 13:49:57 linux NetworkManager[850]: <info> Policy set 'ECURB' (wlan0) as default for IPv4 routing and DNS.
Oct 19 13:49:57 linux NetworkManager[850]: <info> DNS: starting dnsmasq...
Oct 19 13:49:57 linux NetworkManager[850]: <warn> dnsmasq not available on the bus, can't update servers.
Oct 19 13:49:57 linux NetworkManager[850]: <error> [1413740997.702896] [nm-dns-dnsmasq.c:396] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
Oct 19 13:49:57 linux NetworkManager[850]: <warn> DNS: plugin dnsmasq update failed
Oct 19 13:49:57 linux NetworkManager[850]: <info> Writing DNS information to /sbin/resolvconf
Oct 19 13:49:58 linux NetworkManager[850]: <info> Activation (wlan0) successful, device activated.
Oct 19 13:49:58 linux NetworkManager[850]: <warn> dnsmasq appeared on DBus: :1.34
Oct 19 13:49:58 linux NetworkManager[850]: <info> Writing DNS information to /sbin/resolvconf
Oct 19 13:50:13 linux NetworkManager[850]: <info> (wlan0): IP6 addrconf timed out or failed.
Oct 19 13:50:13 linux NetworkManager[850]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Oct 19 13:50:13 linux NetworkManager[850]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Oct 19 13:50:13 linux NetworkManager[850]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Oct 19 13:53:29 linux NetworkManager[850]: <warn> Connection disconnected (reason -4)
Oct 19 13:53:29 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: completed -> disconnected
Oct 19 13:53:29 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Oct 19 13:53:33 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Oct 19 13:53:33 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: authenticating -> disconnected
Oct 19 13:53:34 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Oct 19 13:53:37 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Oct 19 13:53:38 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: authenticating -> disconnected
Oct 19 13:53:39 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Oct 19 13:53:42 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Oct 19 13:53:42 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: authenticating -> disconnected
Oct 19 13:53:45 linux NetworkManager[850]: <warn> (wlan0): link timed out.
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): device state change: activated -> failed (reason 'SSID not found') [100 120 53]
Oct 19 13:53:45 linux NetworkManager[850]: <info> NetworkManager state is now DISCONNECTED
Oct 19 13:53:45 linux NetworkManager[850]: <warn> Activation (wlan0) failed for connection 'ECURB'
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): deactivating device (reason 'none') [0]
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 1645
Oct 19 13:53:45 linux NetworkManager[850]: <warn> DNS: plugin dnsmasq update failed
Oct 19 13:53:45 linux NetworkManager[850]: <info> Removing DNS information from /sbin/resolvconf
Oct 19 13:53:48 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> inactive
lsmod：
Module Size Used by
ctr 13049 1
ccm 17773 1
bnep 19624 2
rfcomm 69160 8
snd_hda_codec_analog 15049 1
hid_generic 12548 0
uvcvideo 80885 0
videobuf2_vmalloc 13216 1 uvcvideo
videobuf2_memops 13362 1 videobuf2_vmalloc
videobuf2_core 40664 1 uvcvideo
usbhid 52659 0
hid 106148 2 hid_generic,usbhid
usb_storage 62209 0
videodev 134688 2 uvcvideo,videobuf2_core
coretemp 13435 0
kvm_intel 143109 0
kvm 451511 1 kvm_intel
pcmcia 62299 0
joydev 17381 0
serio_raw 13462 0
arc4 12608 2
lpc_ich 21080 0
yenta_socket 41027 0
pcmcia_rsrc 18407 1 yenta_socket
pcmcia_core 23592 3 pcmcia,pcmcia_rsrc,yenta_socket
iwl3945 73259 0
iwlegacy 100569 1 iwl3945
mac80211 630653 2 iwl3945,iwlegacy
cfg80211 484040 3 iwl3945,iwlegacy,mac80211
snd_hda_intel 56451 6
snd_hda_codec 192906 2 snd_hda_intel,snd_hda_codec_analog
snd_hwdep 13602 1 snd_hda_codec
snd_pcm 102099 3 snd_hda_codec,snd_hda_intel
snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
i915 783805 3
btusb 32412 0
drm_kms_helper 53081 1 i915
bluetooth 391136 22 bnep,btusb,rfcomm
drm 303102 4 i915,drm_kms_helper
thinkpad_acpi 81013 0
nvram 14411 1 thinkpad_acpi
snd_seq_midi 13324 0
i2c_algo_bit 13413 1 i915
snd_seq_midi_event 14899 1 snd_seq_midi
wmi 19177 0
snd_rawmidi 30144 1 snd_seq_midi
snd_seq 61560 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 29482 2 snd_pcm,snd_seq
snd 69322 22 snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device,snd_hda_codec_analog,snd_seq_midi
soundcore 12680 1 snd
parport_pc 32701 0
ppdev 17671 0
mac_hid 13205 0
lp 17759 0
parport 42348 3 lp,ppdev,parport_pc
video 19476 1 i915
psmouse 106678 0
firewire_ohci 40409 0
firewire_core 68769 1 firewire_ohci
crc_itu_t 12707 1 firewire_core
e1000e 254433 0
ptp 18933 1 e1000e
pps_core 19382 1 ptp
sudo lshw -C network：
*-network
description: Ethernet interface
product: 82566MM Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eth0
version: 03
serial: 00:1c:25:b6:d6:fd
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=2.3.2-k firmware=0.3-0 latency=0 link=no multicast=yes port=twisted pair
resources: irq:45 memory:fe000000-fe01ffff memory:fe025000-fe025fff ioport:1840(size=32)
*-network
description: Wireless interface
product: PRO/Wireless 3945ABG [Golan] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 02
serial: 00:1f:3c:55:a7:e6
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl3945 driverversion=3.13.0-36-generic firmware=15.32.2.9 ip=192.168.0.8 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
resources: irq:47 memory:df3ff000-df3fffff
Network Manager activity form syslog：
Oct 19 13:49:57 linux NetworkManager[850]: <info> NetworkManager state is now CONNECTED_GLOBAL
Oct 19 13:49:57 linux NetworkManager[850]: <info> Policy set 'ECURB' (wlan0) as default for IPv4 routing and DNS.
Oct 19 13:49:57 linux NetworkManager[850]: <info> DNS: starting dnsmasq...
Oct 19 13:49:57 linux NetworkManager[850]: <warn> dnsmasq not available on the bus, can't update servers.
Oct 19 13:49:57 linux NetworkManager[850]: <error> [1413740997.702896] [nm-dns-dnsmasq.c:396] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
Oct 19 13:49:57 linux NetworkManager[850]: <warn> DNS: plugin dnsmasq update failed
Oct 19 13:49:57 linux NetworkManager[850]: <info> Writing DNS information to /sbin/resolvconf
Oct 19 13:49:58 linux NetworkManager[850]: <info> Activation (wlan0) successful, device activated.
Oct 19 13:49:58 linux NetworkManager[850]: <warn> dnsmasq appeared on DBus: :1.34
Oct 19 13:49:58 linux NetworkManager[850]: <info> Writing DNS information to /sbin/resolvconf
Oct 19 13:50:13 linux NetworkManager[850]: <info> (wlan0): IP6 addrconf timed out or failed.
Oct 19 13:50:13 linux NetworkManager[850]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Oct 19 13:50:13 linux NetworkManager[850]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Oct 19 13:50:13 linux NetworkManager[850]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Oct 19 13:53:29 linux NetworkManager[850]: <warn> Connection disconnected (reason -4)
Oct 19 13:53:29 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: completed -> disconnected
Oct 19 13:53:29 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Oct 19 13:53:33 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Oct 19 13:53:33 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: authenticating -> disconnected
Oct 19 13:53:34 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Oct 19 13:53:37 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Oct 19 13:53:38 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: authenticating -> disconnected
Oct 19 13:53:39 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Oct 19 13:53:42 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Oct 19 13:53:42 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: authenticating -> disconnected
Oct 19 13:53:45 linux NetworkManager[850]: <warn> (wlan0): link timed out.
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): device state change: activated -> failed (reason 'SSID not found') [100 120 53]
Oct 19 13:53:45 linux NetworkManager[850]: <info> NetworkManager state is now DISCONNECTED
Oct 19 13:53:45 linux NetworkManager[850]: <warn> Activation (wlan0) failed for connection 'ECURB'
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): deactivating device (reason 'none') [0]
Oct 19 13:53:45 linux NetworkManager[850]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 1645
Oct 19 13:53:45 linux NetworkManager[850]: <warn> DNS: plugin dnsmasq update failed
Oct 19 13:53:45 linux NetworkManager[850]: <info> Removing DNS information from /sbin/resolvconf
Oct 19 13:53:48 linux NetworkManager[850]: <info> (wlan0): supplicant interface state: disconnected -> inactive