自 Ubuntu 14.04 以来，我的 Thinkpad T440p 上的 wifi 一直开箱即用。我一直进行版本升级。大约两个月前，我注意到我的电脑无法连接到我的工作 wifi，即使密码正确。它尝试连接然后失败，但我的智能手机连接到同一个 wifi 网络。
我觉得这可能是 Ubuntu 的问题，于是我运行了一些命令，包括sudo ifconfig wlan0 down和sudo iwlwifi wlan0 power off。当我尝试通过 ifconfig 启动 wlan0 接口时，出现了 SIOCSI 错误。我觉得可能是驱动程序的问题，于是我重新安装了 Linux 固件，并禁用和启用了英特尔微码。
现在我的无线网卡甚至无法被我的电脑检测到，例如使用 lspci、lshw、lsusb 等，即使使用 sudo 也是如此。
前段时间，在使用过程中有时会检测到 wifi 卡（虽然是随机的），但无法找到或连接到任何网络，并且我在 dmesg 中收到“无法加载固件块”错误。无线网卡集成了 wifi 和蓝牙。蓝牙运行正常，我目前正在通过蓝牙网络共享浏览网页。我已在 bios 中禁用并启用了 wifi 和蓝牙，但没有任何变化。我已卸下电池并将电脑拔下电源 4 小时，但开机后仍无济于事。
我需要帮助来恢复我的 wifi，因为在我看来，在启动时，iwlwifi 根本没有加载。
我已经升级到最新内核，甚至反向移植了内核，但都无济于事。我还尝试了反向移植的 Linux 固件，最糟糕的是，当我尝试使用实时驱动器 wifi 时，这次它不起作用了。
########## wireless info START ##########
Report from: 09 Dec 2016 10:53 GMT +0000
Booted last: 09 Dec 2016 00:00 GMT +0000
Script from: 08 Jul 2016 02:16 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 16.10
Release: 16.10
Codename: yakkety
##### kernel ############################
Linux 4.8.0-27-generic #29-Ubuntu SMP Thu Oct 20 21:03:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro
##### desktop ###########################
GNOME
##### lspci #############################
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I217-LM [8086:153a] (rev 04)
Subsystem: Lenovo ThinkPad T440p [17aa:220e]
Kernel driver in use: e1000e
##### lsusb #############################
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 008: ID 04f2:b39a Chicony Electronics Co., Ltd
Bus 001 Device 007: ID 8087:07da Intel Corp.
Bus 001 Device 002: ID 8087:8008 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
##### lsmod #############################
iwldvm 233472 0
iwlwifi 229376 1 iwldvm
mac80211 757760 1 iwldvm
cfg80211 581632 3 iwlwifi,mac80211,iwldvm
wmi 16384 0
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether <MAC address> txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xe0500000-e0520000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 290166 bytes 18190136 (18.1 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 290166 bytes 18190136 (18.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether <MAC address> txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0-nic: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether <MAC address> txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
virbr0 no wireless extensions.
virbr0-nic no wireless extensions.
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Wicd
Running:
root 847 1 0 Dec08 ? 00:00:02 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: virbr0
GENERAL.TYPE: bridge
GENERAL.NM-TYPE: NMDeviceBridge
GENERAL.VENDOR:
GENERAL.PRODUCT:
GENERAL.DRIVER: bridge
GENERAL.DRIVER-VERSION: 2.3
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC address>
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/virtual/net/virbr0
GENERAL.IP-IFACE: virbr0
GENERAL.IS-SOFTWARE: yes
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: virbr0
GENERAL.CON-UUID: 91fc76a8-7ea7-419a-bd4b-0b53cd0f1ab4
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/1
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: yes
BRIDGE.SLAVES:
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{9}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 91fc76a8-7ea7-419a-bd4b-0b53cd0f1ab4 | virbr0
IP4.ADDRESS[1]: 192.168.122.1/24
IP4.GATEWAY:
IP6.GATEWAY:
GENERAL.DEVICE: <MAC address>
GENERAL.TYPE: bt
GENERAL.NM-TYPE: NMDeviceBt
GENERAL.VENDOR:
GENERAL.PRODUCT:
GENERAL.DRIVER: bluez
GENERAL.DRIVER-VERSION:
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR: <MAC address>
GENERAL.MTU: 0
GENERAL.STATE: 30 (disconnected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /org/bluez/hci0/dev_80_19_67_6E_7D_FC
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
BLUETOOTH.CAPABILITIES: NAP
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{1}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 9e6a9f5d-9aa6-488c-ba6b-ece265d9ee88 | Pike-BT
GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Intel Corporation
GENERAL.PRODUCT: Ethernet Connection I217-LM (ThinkPad T440p)
GENERAL.DRIVER: e1000e
GENERAL.DRIVER-VERSION: 3.2.6-k
GENERAL.FIRMWARE-VERSION: 0.13-3
GENERAL.HWADDR: <MAC address>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 2 (Device is now managed)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:19.0/net/eth0
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIRED-PROPERTIES.CARRIER: off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
GENERAL.DEVICE: virbr0-nic
GENERAL.TYPE: tun
GENERAL.NM-TYPE: NMDeviceTun
GENERAL.VENDOR:
GENERAL.PRODUCT:
GENERAL.DRIVER: tun
GENERAL.DRIVER-VERSION: 1.6
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR: <MAC address>
GENERAL.MTU: 1500
GENERAL.STATE: 10 (unmanaged)
GENERAL.REASON: 41 (The device's existing connection was assumed)
GENERAL.UDI: /sys/devices/virtual/net/virbr0-nic
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: yes
GENERAL.NM-MANAGED: no
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: yes
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
no-auto-default=<MAC address>,
[ifupdown]
managed=true
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/BRH-NITA]] (600 root)
[connection] id=BRH-NITA | type=wifi | permissions=
[wifi] mac-address=<MAC address> | mac-address-blacklist= | ssid=BRH-NITA
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/pike]] (600 root)
[connection] id=pike | type=wifi | permissions=user:arbayong:;
[wifi] mac-address=<MAC address> | mac-address-blacklist= | ssid=pike
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Africa/Accra (based on set time zone)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
##### iwlist channels ###################
eth0 no frequency information.
lo no frequency information.
virbr0 no frequency information.
virbr0-nic no frequency information.
##### iwlist scan #######################
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
virbr0 Interface doesn't support scanning.
virbr0-nic Interface doesn't support scanning.
##### module infos ######################
[iwldvm]
filename: /lib/modules/4.8.0-27-generic/kernel/drivers/net/wireless/intel/iwlwifi/dvm/iwldvm.ko
license: GPL
author: Copyright(c) 2003- 2015 Intel Corporation <[email protected]>
description: Intel(R) Wireless WiFi Link AGN driver for Linux
srcversion: 3A75FAFD9EE2AF56E0994D5
depends: mac80211,iwlwifi,cfg80211
intree: Y
vermagic: 4.8.0-27-generic SMP mod_unload modversions
parm: force_cam:force continuously aware mode (no power saving at all) (bool)
[iwlwifi]
filename: /lib/modules/4.8.0-27-generic/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko
license: GPL
author: Copyright(c) 2003- 2015 Intel Corporation <[email protected]>
description: Intel(R) Wireless WiFi driver for Linux
firmware: iwlwifi-100-5.ucode
firmware: iwlwifi-1000-5.ucode
firmware: iwlwifi-135-6.ucode
firmware: iwlwifi-105-6.ucode
firmware: iwlwifi-2030-6.ucode
firmware: iwlwifi-2000-6.ucode
firmware: iwlwifi-5150-2.ucode
firmware: iwlwifi-5000-5.ucode
firmware: iwlwifi-6000g2b-IWL6000G2B_UCODE_API_MAX.ucode
firmware: iwlwifi-6000g2a-6.ucode
firmware: iwlwifi-6050-5.ucode
firmware: iwlwifi-6000-6.ucode
firmware: iwlwifi-7265D-24.ucode
firmware: iwlwifi-7265-17.ucode
firmware: iwlwifi-3168-24.ucode
firmware: iwlwifi-3160-17.ucode
firmware: iwlwifi-7260-17.ucode
firmware: iwlwifi-8265-24.ucode
firmware: iwlwifi-8000C--24.ucode
firmware: iwlwifi-9260-th-a0-lc-a0--24.ucode
firmware: iwlwifi-9260-th-a0-jf-a0--24.ucode
firmware: iwlwifi-9000-pu-a0-lc-a0--24.ucode
firmware: iwlwifi-Qu-a0-jf-b0--24.ucode
srcversion: 5916491CB41B355C975C3F8
depends: cfg80211
intree: Y
vermagic: 4.8.0-27-generic SMP mod_unload modversions
parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm: amsdu_size:amsdu size 0: 12K for multi Rx queue devices, 4K for other devices 1:4K 2:8K 3:12K (default 0) (int)
parm: fw_restart:restart firmware in case of error (default true) (bool)
parm: antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm: nvm_file:NVM file name (charp)
parm: d0i3_disable:disable d0i3 functionality (default: Y) (bool)
parm: lar_disable:disable LAR functionality (default: N) (bool)
parm: uapsd_disable:disable U-APSD functionality bitmap 1: BSS 2: P2P Client (default: 3) (uint)
parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm: power_save:enable WiFi power management (default: disable) (bool)
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
parm: fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)
parm: d0i3_timeout:Timeout to D0i3 entry when idle (ms) (uint)
parm: disable_11ac:Disable VHT capabilities (default: false) (bool)
[mac80211]
filename: /lib/modules/4.8.0-27-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: BDE5CB0CC0A980B65D19934
depends: cfg80211
intree: Y
vermagic: 4.8.0-27-generic SMP mod_unload modversions
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/4.8.0-27-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: F170FED576AF12B070D2E69
depends:
intree: Y
vermagic: 4.8.0-27-generic SMP mod_unload modversions
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 #################
[iwldvm]
force_cam: Y
[iwlwifi]
11n_disable: 1
amsdu_size: 0
antenna_coupling: 0
bt_coex_active: N
d0i3_disable: Y
d0i3_timeout: 1000
disable_11ac: N
fw_monitor: N
fw_restart: Y
lar_disable: N
led_mode: 1
nvm_file: (null)
power_level: 0
power_save: N
swcrypto: 0
uapsd_disable: 3
[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 ######################
##### 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]
options iwlwifi 11n_disable=1
options iwlwifi bt_coex_active=N
options iwlwifi led_mode=1
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
[/etc/modprobe.d/qemu-system-x86.conf]
options kvm_intel nested=1
##### rc.local ##########################
exit 0
##### pm-utils ##########################
[/etc/pm/power.d/wireless] (755 root)
iwconfig wlan0 power off
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x8086:0x153a (e1000e)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:0x088f (iwlwifi)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[23540.095629] e1000e: eth0 NIC Link is Down
[23540.097474] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready (repeated 2 times)
########## wireless info END ############