伙计们，我的 wifi 没法用了。我使用局域网工作了很长时间。但是，明天我急需能用的 wifi。救命 :))
我尝试过的事情：
- 检查 BIOS - wifi 已启用
- 尝试多次点击 fn + wifi 按钮
我的输出lspci | grep Wireless是：
02:00.0 Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express)(rev 01)
命令iwconfig显示我的局域网，但不显示 wifi。
命令uname -r输出：
4.2.0-36-generic
和 ubuntu 14.04 64位。
我在网上找到的建议没有帮助，准备提供任何输出，希望得到您的帮助;)
感谢和问候。
更新： 输出：
lspci -nnk | grep -iA2 net; rfkill list all
02:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
Subsystem: Lenovo Device [17aa:30a1]
Kernel driver in use: ath9k
03:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8152 v1.1 Fast Ethernet [1969:2060] (rev c1)
Subsystem: Lenovo Device [17aa:396b]
Kernel driver in use: atl1c
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
更新：
########## wireless info START ##########
Report from: 07 Jun 2016 16:46 EEST +0300
Booted last: 07 Jun 2016 14:45 EEST +0300
Script from: 26 May 2016 21:56 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.04.4 LTS
Release: 14.04
Codename: trusty
##### kernel ############################
Linux 4.2.0-36-generic #42~14.04.1-Ubuntu SMP Fri May 13 17:27:22 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
02:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
Subsystem: Lenovo Device [17aa:30a1]
Kernel driver in use: ath9k
03:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8152 v1.1 Fast Ethernet [1969:2060] (rev c1)
Subsystem: Lenovo Device [17aa:396b]
Kernel driver in use: atl1c
##### lsusb #############################
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 04f2:b1c1 Chicony Electronics Co., Ltd
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 0458:003a KYE Systems Corp. (Mouse Systems) NetScroll+ Mini Traveler / Genius NetScroll 120
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
##### lsmod #############################
ath9k 143360 0
ath9k_common 36864 1 ath9k
ath9k_hw 466944 2 ath9k_common,ath9k
ath 32768 3 ath9k_common,ath9k,ath9k_hw
mac80211 741376 1 ath9k
cfg80211 552960 4 ath,ath9k_common,ath9k,mac80211
ideapad_laptop 24576 0
sparse_keymap 16384 1 ideapad_laptop
video 40960 1 ideapad_laptop
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF1]>
inet addr:192.168.0.101 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::<IP6 'eth0' [IF1]>/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:459757 errors:0 dropped:0 overruns:0 frame:0
TX packets:310387 errors:0 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:1000
RX bytes:282567338 (282.5 MB) TX bytes:28380101 (28.3 MB)
wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF2]>
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 869 1 0 14:45 ? 00:00:00 NetworkManager
##### NetworkManager info ###############
NetworkManager Tool
State: connected (global)
- Device: eth0 [Wired connection 1] -------------------------------------------
Type: Wired
Driver: atl1c
State: connected
Default: yes
HW Address: <MAC 'eth0' [IF1]>
Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s
Wired Properties
Carrier: on
IPv4 Settings:
Address: 192.168.0.101
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 192.168.0.1
- Device: wlan0 ----------------------------------------------------------------
Type: 802.11 WiFi
Driver: ath9k
State: unavailable
Default: no
HW Address: <MAC 'wlan0' [IF2]>
Capabilities:
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########
##### iw reg get ########################
Region: Europe/Kiev (based on set time zone)
country 00:
(2402 - 2472 @ 40), (3, 20)
(2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
(5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
##### iwlist channels ###################
eth0 no frequency information.
lo no frequency information.
wlan0 13 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
##### iwlist scan #######################
eth0 Interface doesn't support scanning.
wlan0 Interface doesn't support scanning : Network is down
lo Interface doesn't support scanning.
##### module infos ######################
[ath9k]
filename: /lib/modules/4.2.0-36-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko
license: Dual BSD/GPL
description: Support for Atheros 802.11n wireless LAN cards.
author: Atheros Communications
srcversion: 681B59FC4C4EB63D7B98108
depends: ath9k_hw,mac80211,ath9k_common,cfg80211,ath
intree: Y
vermagic: 4.2.0-36-generic SMP mod_unload modversions
signer: Build time autogenerated kernel key
sig_key: 88:C2:A3:E9:92:3B:E7:84:6A:02:95:4D:3D:CF:D2:46:B2:C2:07:9A
sig_hashalgo: sha512
parm: debug:Debugging mask (uint)
parm: nohwcrypt:Disable hardware encryption (int)
parm: blink:Enable LED blink on activity (int)
parm: btcoex_enable:Enable wifi-BT coexistence (int)
parm: bt_ant_diversity:Enable WLAN/BT RX antenna diversity (int)
parm: ps_enable:Enable WLAN PowerSave (int)
parm: use_chanctx:Enable channel context for concurrency (int)
[ath9k_common]
filename: /lib/modules/4.2.0-36-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko
license: Dual BSD/GPL
description: Shared library for Atheros wireless 802.11n LAN cards.
author: Atheros Communications
srcversion: 619327754B562F78060585E
depends: ath9k_hw,cfg80211,ath
intree: Y
vermagic: 4.2.0-36-generic SMP mod_unload modversions
signer: Build time autogenerated kernel key
sig_key: 88:C2:A3:E9:92:3B:E7:84:6A:02:95:4D:3D:CF:D2:46:B2:C2:07:9A
sig_hashalgo: sha512
[ath9k_hw]
filename: /lib/modules/4.2.0-36-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko
license: Dual BSD/GPL
description: Support for Atheros 802.11n wireless LAN cards.
author: Atheros Communications
srcversion: B60D8B6E494EC584155DC34
depends: ath
intree: Y
vermagic: 4.2.0-36-generic SMP mod_unload modversions
signer: Build time autogenerated kernel key
sig_key: 88:C2:A3:E9:92:3B:E7:84:6A:02:95:4D:3D:CF:D2:46:B2:C2:07:9A
sig_hashalgo: sha512
[ath]
filename: /lib/modules/4.2.0-36-generic/kernel/drivers/net/wireless/ath/ath.ko
license: Dual BSD/GPL
description: Shared library for Atheros wireless LAN cards.
author: Atheros Communications
srcversion: F1417AD8012BEEF1598B307
depends: cfg80211
intree: Y
vermagic: 4.2.0-36-generic SMP mod_unload modversions
signer: Build time autogenerated kernel key
sig_key: 88:C2:A3:E9:92:3B:E7:84:6A:02:95:4D:3D:CF:D2:46:B2:C2:07:9A
sig_hashalgo: sha512
[mac80211]
filename: /lib/modules/4.2.0-36-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 507FBE319B9E7D3A3EF5BA9
depends: cfg80211
intree: Y
vermagic: 4.2.0-36-generic SMP mod_unload modversions
signer: Build time autogenerated kernel key
sig_key: 88:C2:A3:E9:92:3B:E7:84:6A:02:95:4D:3D:CF:D2:46:B2:C2:07:9A
sig_hashalgo: sha512
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[cfg80211]
filename: /lib/modules/4.2.0-36-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: 51BFE91AA49B49C5AD3C396
depends:
intree: Y
vermagic: 4.2.0-36-generic SMP mod_unload modversions
signer: Build time autogenerated kernel key
sig_key: 88:C2:A3:E9:92:3B:E7:84:6A:02:95:4D:3D:CF:D2:46:B2:C2:07:9A
sig_hashalgo: sha512
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[ath9k]
blink: 0
bt_ant_diversity: 0
btcoex_enable: 0
nohwcrypt: 0
ps_enable: 0
use_chanctx: 0
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
lp
rtc
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
##### rc.local ##########################
exit 0
##### pm-utils ##########################
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x1969:0x2060 (atl1c)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF1]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x168c:0x002b (ath9k)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF2]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 20.453166] atl1c 0000:03:00.0: atl1c: eth0 NIC Link is Up<100 Mbps Full Duplex>
########## wireless info END ############
更新3：
Version: 36CN19WW(V2.05)
Version: Lenovo G565
Version: Base Board Version
Version: Chassis Version
String: Compiler Version: VC 9.0
Version: AMD Athlon(tm) II P360 Dual-Core Processor
答案1
我的联想 G50 有一个飞行模式按钮（F7 键上的飞机图标）。按 Fn+F7 可关闭我的 wifi。这或许可以解释他的 wifi 处于“硬阻止”状态。
答案2
我会首先在软件源设置窗口中检查您的受限驱动程序。然后我会启动 Ubuntu（如果您的系统已升级）或 Fedora 的实时磁盘，看看它们是否能识别您的 wifi 并正常工作。如果两者都不起作用，并且您有一个额外的硬盘和一个 Windows 磁盘，请尝试在额外的驱动器上安装它，看看在安装驱动程序后 Windows 是否可以使用它（更像是计算机商店测试）。
如果以上方法都不管用，而您的 WiFi 确实在某个时候能用，那么您的 WiFi 卡可能有问题。您可以去电脑店，要求试用他们有的任何额外卡（他们有很多），然后购买能用的。不要让他们把卡拿到后面，在柜台上换掉。这样速度更快，而且只要把卡拿到后面，他们就会收取额外费用。
答案3
由于这是使用 ideapad_laptop 模块的联想笔记本电脑，请执行以下操作作为临时解决方案
echo "blacklist ideapad_laptop" | sudo tee /etc/modprobe.d/ideapad_laptop.confideapad_laptop 模块存在错误，在某些联想电脑上会错误读取 rfkill 状态。内核开发人员已向模块添加了一个怪癖表，以便 rfkill 可以正常工作。
我可能能够利用以下结果做出更好的解决方案
sudo dmidecode | grep -i version