Wifi 无法使用，无法激活 wifi。总是收到消息 wifi 不可用，收音机已关闭。机器无法手动激活，应该会自动开启。
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04 LTS"
Bus 002 Device 003: ID 413c:2501 Dell Computer Corp.
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 006: ID 064e:8120 Suyin Corp.
Bus 001 Device 005: ID 8086:0189 Intel Corp.
Bus 001 Device 004: ID 0bda:0139 Realtek Semiconductor Corp. RTS5139 Card Reader Controller
Bus 001 Device 003: ID 0408:3008 Quanta Computer, Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
多次调用的输出lspci如下：
fred@fred-Inspiron-One-2320:~$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5)
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 525M] (rev a1)
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] (rev 34)
04:00.0 Multimedia controller: Philips Semiconductors SAA7231 (rev ca)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
fred@fred-Inspiron-One-2320:~$ lspci -nn | grep -i net
03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] [8086:0091] (rev 34)
05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
fred@fred-Inspiron-One-2320:~$ lspci -k
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
Subsystem: Dell 2nd Generation Core Processor Family DRAM Controller
Kernel driver in use: snb_uncore
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
Subsystem: Dell 2nd Generation Core Processor Family Integrated Graphics Controller
Kernel modules: i915
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Dell 6 Series/C200 Series Chipset Family MEI Controller
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
Subsystem: Dell 6 Series/C200 Series Chipset Family USB Enhanced Host Controller
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
Subsystem: Dell 6 Series/C200 Series Chipset Family High Definition Audio Controller
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
Subsystem: Dell 6 Series/C200 Series Chipset Family USB Enhanced Host Controller
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset Family LPC Controller (rev 05)
Subsystem: Dell H61 Express Chipset Family LPC Controller
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 05)
Subsystem: Dell 6 Series/C200 Series Chipset Family SATA AHCI Controller
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
Subsystem: Dell 6 Series/C200 Series Chipset Family SMBus Controller
Kernel modules: i2c_i801
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 525M] (rev a1)
Subsystem: Dell GF108M [GeForce GT 525M]
Kernel modules: nvidiafb, nouveau
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] (rev 34)
Subsystem: Intel Corporation Centrino Advanced-N 6230 AGN
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
04:00.0 Multimedia controller: Philips Semiconductors SAA7231 (rev ca)
Subsystem: Avermedia Technologies Inc SAA7231
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
Subsystem: Dell RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
Kernel driver in use: r8169
Kernel modules: r8169
输出lshw为：
fred@fred-Inspiron-One-2320:~$ sudo lshw -C network
*-network DÉSACTIVÉ
description: Interface réseau sans fil
produit: Centrino Advanced-N 6230 [Rainbow Peak]
fabriquant: Intel Corporation
identifiant matériel: 0
information bus: pci@0000:03:00.0
nom logique: wlp3s0
version: 34
numéro de série: 88:53:2e:c9:c1:06
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-31-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11abg
ressources: irq:32 mémoire:fb000000-fb001fff
*-network
description: Ethernet interface
produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
fabriquant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:05:00.0
nom logique: enp5s0
version: 06
numéro de série: 00:21:70:68:68:de
taille: 1Gbit/s
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress msix vpd bus_master cap_list 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=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=192.168.1.77 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
ressources: irq:29 portE/S:d000(taille=256) mémoire:e2104000-e2104fff mémoire:e2100000-e2103fff
输出lsmod为：
fred@fred-Inspiron-One-2320:~$ lsmod
Module Size Used by
rfcomm 69632 0
bnep 20480 2
btrfs 987136 0
xor 24576 1 btrfs
raid6_pq 102400 1 btrfs
ufs 73728 0
qnx4 16384 0
hfsplus 106496 0
hfs 57344 0
minix 36864 0
ntfs 98304 0
msdos 20480 0
jfs 180224 0
xfs 970752 0
libcrc32c 16384 1 xfs
rtsx_usb_ms 20480 0
memstick 20480 1 rtsx_usb_ms
uvcvideo 90112 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
arc4 16384 2
videobuf2_v4l2 28672 1 uvcvideo
videobuf2_core 36864 2 uvcvideo,videobuf2_v4l2
v4l2_common 16384 1 videobuf2_v4l2
iwldvm 233472 0
mac80211 737280 1 iwldvm
snd_hda_codec_realtek 86016 1
snd_hda_codec_generic 77824 1 snd_hda_codec_realtek
videodev 176128 4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
media 24576 2 uvcvideo,videodev
hid_multitouch 20480 0
intel_rapl 20480 0
snd_hda_intel 36864 3
snd_hda_codec 135168 3 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_intel
joydev 20480 0
snd_hda_core 73728 4 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
x86_pkg_temp_thermal 16384 0
intel_powerclamp 16384 0
snd_hwdep 16384 1 snd_hda_codec
dell_wmi_aio 16384 0
gpio_ich 16384 0
snd_pcm 106496 3 snd_hda_codec,snd_hda_intel,snd_hda_core
sparse_keymap 16384 1 dell_wmi_aio
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
coretemp 16384 0
snd_rawmidi 32768 1 snd_seq_midi
kvm_intel 172032 0
iwlwifi 200704 1 iwldvm
kvm 536576 1 kvm_intel
btusb 45056 0
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
dcdbas 16384 0
btrtl 16384 1 btusb
btbcm 16384 1 btusb
dell_smm_hwmon 16384 0
btintel 16384 1 btusb
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
snd_timer 32768 2 snd_pcm,snd_seq
cfg80211 565248 3 iwlwifi,mac80211,iwldvm
snd 81920 16 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
bluetooth 520192 29 bnep,btbcm,btrtl,btusb,rfcomm,btintel
input_leds 16384 0
serio_raw 16384 0
cryptd 20480 0
soundcore 16384 1 snd
8250_fintek 16384 0
mei_me 36864 0
shpchp 36864 0
mei 98304 1 mei_me
lpc_ich 24576 0
mac_hid 16384 0
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,ppdev,parport_pc
autofs4 40960 2
rtsx_usb_sdmmc 28672 0
rtsx_usb 24576 2 rtsx_usb_sdmmc,rtsx_usb_ms
hid_generic 16384 0
usbhid 49152 0
hid 118784 3 hid_multitouch,hid_generic,usbhid
nouveau 1495040 0
i915 1208320 0
mxm_wmi 16384 1 nouveau
ttm 94208 1 nouveau
i2c_algo_bit 16384 2 i915,nouveau
ahci 36864 2
drm_kms_helper 147456 2 i915,nouveau
libahci 32768 1 ahci
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
psmouse 126976 0
r8169 81920 0
drm 360448 4 ttm,i915,drm_kms_helper,nouveau
mii 16384 1 r8169
wmi 20480 3 dell_wmi_aio,mxm_wmi,nouveau
video 40960 2 i915,nouveau
fjes 28672 0
输出iwconfig为：
fred@fred-Inspiron-One-2320:~$ iwconfig
wlp3s0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
lo no wireless extensions.
enp5s0 no wireless extensions.
输出ifconfig为：
fred@fred-Inspiron-One-2320:~$ ifconfig
enp5s0 Link encap:Ethernet HWaddr 00:21:70:68:68:de
inet adr:192.168.1.77 Bcast:192.168.1.255 Masque:255.255.255.0
adr inet6: fe80::6497:ff1b:1d54:b503/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:2089 erreurs:0 :0 overruns:0 frame:0
TX packets:1315 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:553542 (553.5 KB) Octets transmis:223624 (223.6 KB)
lo Link encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:65536 Metric:1
Packets reçus:337 erreurs:0 :0 overruns:0 frame:0
TX packets:337 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1
Octets reçus:29340 (29.3 KB) Octets transmis:29340 (29.3 KB)
输出iwlist为：
fred@fred-Inspiron-One-2320:~$ sudo iwlist scan
wlp3s0 Interface doesn't support scanning : Network is down
lo Interface doesn't support scanning.
enp5s0 Interface doesn't support scanning.
内核信息：
fred@fred-Inspiron-One-2320:~$ uname -r -m
4.4.0-31-generic x86_64
其他信息：
fred@fred-Inspiron-One-2320:~$ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
fred@fred-Inspiron-One-2320:~$ nm-tool
La commande « nm-tool » est introuvable, vouliez-vous dire :
La commande « dm-tool » du paquet « lightdm » (main)
nm-tool : commande introuvable
fred@fred-Inspiron-One-2320:~$ sudo rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
fred@fred-Inspiron-One-2320:~$ nmcli connection show
NOM UUID TYPE PÉRIPHÉRIQUE
enp5s0 1c159d44-aeeb-45ff-aeb7-bb72d7701d8d 802-3-ethernet enp5s0
Connexion Wi-Fi 1 8faae169-af2a-45df-934e-7dbe17974504 802-11-wireless --
Connexion filaire 1 1d435d80-2947-45d1-87e5-c8b7f4a0fc56 802-3-ethernet --