因此，标题很好地描述了问题。例程如下：
我关掉了电脑。电源线发出哔哔声，所以我睡觉前把它从笔记本电脑上拔下来。电池一直在那里。
我插上电源，当 Ubuntu 启动时，wifi 无法使用。打开它的唯一方法是进行硬重置，拔出电池。简单的重启是行不通的。它只是没有在网络管理器中显示 wifi 选项。
它在新启动时起作用。
所以，我有一张 atheros wifi 卡，驱动程序 ath5k 支持它。我无法使用手动键盘热键打开和关闭 wifi，因为这在 linux 上从来都不起作用。它只是说它一直处于开启状态（即使它不工作）。
所以我尝试了 varunendra 的这个无线脚本在 ubuntuforums 上生成一个包含更多详细信息的 .txt 文件。输出如下：
======== Wireless-Info START ========
System-Info ~~~~~~~~~~~~~~~~~~~~~~~~
ubuntu 3.13.0-37-generic x86_64, Ubuntu 14.04.1 LTS, trusty
CPU : Pentium(R) Dual-Core CPU T4300 @ 2.10GHz
Memory : 3886 MB
Uptime : 17:07:00 up 8:46, 2 users, load average: 0,82, 0,82, 0,59
lspci ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 02)
Subsystem: Fujitsu Technology Solutions Device [1734:113f]
Kernel driver in use: r8169
lsusb ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 008 Device 002: ID 05b8:3166 Agiler, Inc.
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 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 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 003: ID 04f2:b09c Chicony Electronics Co., Ltd
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
PCMCIA Card Info ~~~~~~~~~~~~~~~~~~~
iwconfig ~~~~~~~~~~~~~~~~~~~~~~~~~~~
rfkill ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Interface Soft blocked Hard blocked
2: acer-wireless: Wireless LAN no no
3: hci0: Bluetooth no no
lsmod ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
acer_wmi 32522 0
sparse_keymap 13948 1 acer_wmi
ath5k 149924 0
ath 28698 1 ath5k
mac80211 630653 1 ath5k
cfg80211 484040 3 ath,ath5k,mac80211
wmi 19177 1 acer_wmi
video 19476 2 i915,acer_wmi
module parameters ~~~~~~~~~~~~~~~~~~
acer_wmi (5): brightness=-1 | ec_raw_mode=N | force_series=0 | mailled=-1 | threeg=-1
ath5k (3): fastchanswitch=N | nohwcrypt=N | no_hw_rfkill_switch=N
cfg80211 (2): cfg80211_disable_40mhz_24ghz=N | ieee80211_regdom=00
mac80211 (5): beacon_loss_count=7 | ieee80211_default_rc_algo=minstrel_ht | max_nullfunc_tries=2 | max_probe_tries=5 | probe_wait_ms=500
video (3): allow_duplicates=N | brightness_switch_enabled=Y | use_native_backlight=-1
wmi (2): debug_dump_wdg=N | debug_event=N
nm-tool ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
State: disconnected
================o=======o========o=============o== =======o===========o==============o===========
Interface & ID | Type | Driver | State | Default | Speed | Support | HW Addr
================o=======o========o=============o== =======o===========o==============o===========
eth0 | Wired | r8169 | unavailable | no | | | <MAC eth0>
----------------+-------+--------+-------------+---------+-----------+--------------+-----------
NetworkManager.state ~~~~~~~~~~~~~~~
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
NetworkManager.conf ~~~~~~~~~~~~~~~~
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
NM WiFi Profiles ~~~~~~~~~~~~~~~~~~~
Zelod : ssid=Zelod | mac-address=<MAC wlan0> | ipv4=auto | ipv6=auto
interfaces ~~~~~~~~~~~~~~~~~~~~~~~~~
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
resolv.conf ~~~~~~~~~~~~~~~~~~~~~~~~
Routes & Ping ~~~~~~~~~~~~~~~~~~~~~~
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
iw reg get ~~~~~~~~~~~~~~~~~~~~~~~~~
(Region : "sl_SI.UTF-8")
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 chan ~~~~~~~~~~~~~~~~~~~~~~~~
-
iwlist scan ~~~~~~~~~~~~~~~~~~~~~~~~
blacklist ~~~~~~~~~~~~~~~~~~~~~~~~~~
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
modinfo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[acer_wmi]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/platform/x86/acer-wmi.ko
srcversion: 15371DC0E403E93954B38E5
depends: wmi,sparse-keymap,video
parm: mailled:Set initial state of Mail LED (int)
parm: brightness:Set initial LCD backlight brightness (int)
parm: threeg:Set initial state of 3G hardware (int)
parm: force_series:Force a different laptop series (int)
parm: ec_raw_mode:Enable EC raw mode (bool)
[ath5k]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/ath/ath5k/ath5k.ko
srcversion: F36818A2F0BCB2B0CC9BB8C
depends: mac80211,cfg80211,ath
parm: nohwcrypt:Disable hardware encryption. (bool)
parm: fastchanswitch:Enable fast channel switching for AR2413/AR5413 radios. (bool)
parm: no_hw_rfkill_switch:Ignore the GPIO RFKill switch state (bool)
[ath]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/ath/ath.ko
srcversion: 88A67C5359B02C5A710AFCF
depends: cfg80211
[mac80211]
filename: /lib/modules/3.13.0-37-generic/kernel/net/mac80211/mac80211.ko
srcversion: B822641624778B987844F6F
depends: cfg80211
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/3.13.0-37-generic/kernel/net/wireless/cfg80211.ko
srcversion: C2478077E22138832B71659
depends:
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
[wmi]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/platform/x86/wmi.ko
srcversion: CED5410F008DC70DF5F064B
depends:
parm: debug_event:Log WMI Events [0/1] (bool)
parm: debug_dump_wdg:Dump available WMI interfaces [0/1] (bool)
[video]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/acpi/video.ko
srcversion: FBDB15F61F4F35FB6EE9AC8
depends:
parm: brightness_switch_enabled:bool
parm: allow_duplicates:bool
parm: use_native_backlight:int
udev rules ~~~~~~~~~~~~~~~~~~~~~~~~~
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC eth0>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x168c:0x001c (ath5k)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC wlan0>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
Custom files/entries ~~~~~~~~~~~~~~~
/etc/modules : Default
/etc/rc.local : Default
/etc/modprobe.d : Not Default
/etc/pm/(cnf|pw|sl) : Default
[/etc/modprobe.d]
iwlwifi.conf : remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
mlx4.conf : softdep mlx4_core post: mlx4_en
Kernel boot line ~~~~~~~~~~~~~~~~~~~
BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=UUID=1d753fed-8330-44c0-a7d7-883f9e2dd233 ro quiet splash vt.handoff=7
dmesg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ 0.616940] microcode: Microcode Update Driver: v2.00 <[email protected]>, Peter Oruba
[ 0.617259] audit: initializing netlink socket (disabled)
[ 1.116491] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 10.994509] wmi: Mapper loaded
[ 11.266255] ath5k 0000:04:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 11.266406] ath5k 0000:04:00.0: registered as 'phy0'
[ 11.950798] ath: EEPROM regdomain: 0x60
[ 11.950798] ath: EEPROM indicates we should expect a direct regpair map
[ 11.950800] ath: Country alpha2 being used: 00
[ 11.950801] ath: Regpair used: 0x60
[ 11.958997] ath5k: phy0: Atheros AR2425 chip found (MAC: 0xe2, PHY: 0x70)
[ 11.976594] acer_wmi: Acer Laptop ACPI-WMI Extras
[ 11.977636] acer_wmi: Brightness must be controlled by acpi video driver
[ 15.219881] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 16.306996] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 16.307474] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 18.425323] wlan0: authenticate with <MAC ID removed>
[ 18.432795] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 18.436528] wlan0: authenticated
[ 18.440082] wlan0: associate with <MAC ID removed> (try 1/3)
[ 18.442710] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=1)
[ 18.442945] wlan0: associated
[ 18.442984] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 18.473721] wlan0: deauthenticating from <MAC ID removed> by local choice (reason=2)
[ 18.474027] wlan0: authenticate with <MAC ID removed>
[ 18.474231] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 18.476687] wlan0: authenticated
[ 18.480470] wlan0: associate with <MAC ID removed> (try 1/3)
[ 18.483094] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=1)
[ 18.483321] wlan0: associated
[ 18.498473] ath: EEPROM regdomain: 0x8348
[ 18.498478] ath: EEPROM indicates we should expect a country code
[ 18.498480] ath: doing EEPROM country->regdmn map search
[ 18.498481] ath: country maps to regdmn code: 0x3a
[ 18.498483] ath: Country alpha2 being used: US
[ 18.498484] ath: Regpair used: 0x3a
[ 18.498486] ath: regdomain 0x8348 dynamically updated by country IE
[12194.567341] wlan0: deauthenticating from <MAC ID removed> by local choice (reason=3)
[12197.220055] ath5k 0000:04:00.0: Refused to change power state, currently in D3
======== Done ========
提前谢谢大家。