惠普 envy dv6更新后无法连接 WiFi。如果可以连接，则只能连接 5 分钟或更短时间。
########## wireless info START ##########
Report from: 28 Feb 2015 12:33 EET +0200
Booted last: 28 Feb 2015 12:22 EET +0200
Script from: 20 Sep 2014 23:04 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic
##### kernel ############################
Linux 3.16.0-31-generic #41-Ubuntu SMP Tue Feb 10 15:24:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, intel_pstate=disable
##### desktop ###########################
Ubuntu
##### lspci #############################
0a:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 2230 [8086:0887] (rev c4)
Subsystem: Intel Corporation Centrino Wireless-N 2230 BGN [8086:4062]
Kernel driver in use: iwlwifi
0b:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Subsystem: Hewlett-Packard Company Device [103c:1818]
Kernel driver in use: r8169
##### lsusb #############################
Bus 002 Device 003: ID 8087:07da Intel 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 005: ID 0bda:58d8 Realtek Semiconductor Corp.
Bus 001 Device 004: ID 0461:4d5f Primax Electronics, Ltd
Bus 001 Device 003: ID 138a:0018 Validity Sensors, Inc. Fingerprint scanner
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
Bus 004 Device 002: ID 1058:1042 Western Digital Technologies, Inc.
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 0930:6544 Toshiba Corp. Kingston DataTraveler 2.0 Stick (2GB)
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
##### lsmod #############################
hp_wmi 14109 0
sparse_keymap 13948 1 hp_wmi
iwldvm 236430 0
mac80211 660592 1 iwldvm
mxm_wmi 13021 0
wl 6367694 0
iwlwifi 183038 1 iwldvm
cfg80211 510218 4 wl,iwlwifi,mac80211,iwldvm
wmi 19193 2 hp_wmi,mxm_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
UP 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)
wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF]>
inet addr:192.168.1.5 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fd08:7a4c:44e4:5a00:86a6:c8ff:fe87:6b76/64 Scope:Global
inet6 addr: fd08:7a4c:44e4:5a00:6010:7bb3:af2a:9d66/64 Scope:Global
inet6 addr: fe80::86a6:c8ff:fe87:6b76/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6345 errors:0 dropped:0 overruns:0 frame:0
TX packets:6668 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3315621 (3.3 MB) TX bytes:1703647 (1.7 MB)
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"m7md shw2y 01015665625"
Mode:Managed Frequency:2.437 GHz Access Point: <MAC 'm7md shw2y 01015665625' [AC1]>
Bit Rate=19.5 Mb/s Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=35/70 Signal level=-75 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:6 Invalid misc:33 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0
##### resolv.conf #######################
nameserver 127.0.1.1
##### nm-tool ###########################
NetworkManager Tool
State: connected (global)
- Device: <MAC address> ----------------------------------------------------
Type: Bluetooth
Driver: bluez
State: disconnected
Default: no
Capabilities:
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address: <MAC 'eth0' [IF]>
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
- Device: wlan0 [m7md shw2y 01015665625] --------------------------------------
Type: 802.11 WiFi
Driver: iwlwifi
State: connected
Default: yes
HW Address: <MAC 'wlan0' [IF]>
Capabilities:
Speed: 19 Mb/s
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points (* = current AP)
*m7md shw2y 01015665625: Infra, <MAC 'm7md shw2y 01015665625' [AC1]>, Freq 2437 MHz, Rate 54 Mb/s, Strength 45 WPA2
mohamed2: Infra, <MAC 'mohamed2' [AN2]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 97 WPA2
IPv4 Settings:
Address: 192.168.1.5
Prefix: 24 (255.255.255.0)
Gateway: 192.168.1.1
DNS: 192.168.1.1
IPv6 Settings:
Address: fd08:7a4c:44e4:5a00:6010:7bb3:af2a:9d66
Prefix: 64
Gateway: ::
Address: fd08:7a4c:44e4:5a00:86a6:c8ff:fe87:6b76
Prefix: 64
Gateway: ::
Address: fe80::86a6:c8ff:fe87:6b76
Prefix: 64
Gateway: ::
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
no-auto-default=<MAC 'eth0' [IF]>,
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/ali]] (600 root)
[connection] id=ali | type=802-11-wireless
[802-11-wireless] ssid=ali | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/Mohammad]] (600 root)
[connection] id=Mohammad | type=802-11-wireless
[802-11-wireless] ssid=Mohammad | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/AndroidAP]] (600 root)
[connection] id=AndroidAP | type=802-11-wireless
[802-11-wireless] ssid=AndroidAP | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/AndroidAP.VG3NTX]] (644 root)
[connection] id=AndroidAP | type=802-11-wireless
[802-11-wireless] ssid=AndroidAP | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/m7md shw2y 01015665625]] (600 root)
[connection] id=m7md shw2y 01015665625 | type=802-11-wireless
[802-11-wireless] ssid=m7md shw2y 01015665625 | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/LINKDSL-felimoon]] (600 root)
[connection] id=LINKDSL-felimoon | type=802-11-wireless
[802-11-wireless] ssid=LINKDSL-felimoon | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/mohamed2]] (600 root)
[connection] id=mohamed2 | type=802-11-wireless
[802-11-wireless] ssid=mohamed2 | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Africa/Cairo (based on set time zone)
country EG: DFS-UNSET
(2402 - 2482 @ 40), (N/A, 20)
(5170 - 5250 @ 20), (N/A, 20)
(5250 - 5330 @ 20), (N/A, 20), DFS
##### 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
Current Frequency:2.437 GHz (Channel 6)
##### iwlist scan #######################
Channel occupancy:
1 APs on Frequency:2.437 GHz (Channel 6)
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlan0 Scan completed :
Cell 01 - Address: <MAC 'm7md shw2y 01015665625' [AC1]>
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=37/70 Signal level=-73 dBm
Encryption key:on
ESSID:"m7md shw2y 01015665625"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=00000012b41a05f2
Extra: Last beacon: 88ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
##### module infos ######################
[iwldvm]
filename: /lib/modules/3.16.0-31-generic/kernel/drivers/net/wireless/iwlwifi/dvm/iwldvm.ko
license: GPL
author: Copyright(c) 2003- 2014 Intel Corporation <[email protected]>
version: in-tree:
description: Intel(R) Wireless WiFi Link AGN driver for Linux
srcversion: 716426034C9E4259C23DEDA
depends: iwlwifi,mac80211,cfg80211
intree: Y
vermagic: 3.16.0-31-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: A1:12:C1:8A:44:8A:56:00:47:EF:1F:4D:B7:4D:49:7F:61:A4:50:99
sig_hashalgo: sha512
[mac80211]
filename: /lib/modules/3.16.0-31-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: D0CBADABD6F74A53B0BE7CC
depends: cfg80211
intree: Y
vermagic: 3.16.0-31-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: A1:12:C1:8A:44:8A:56:00:47:EF:1F:4D:B7:4D:49:7F:61:A4:50:99
sig_hashalgo: sha512
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)
[wl]
filename: /lib/modules/3.16.0-31-generic/updates/dkms/wl.ko
license: MIXED/Proprietary
srcversion: DF2576C38AD45205B3556DD
depends: cfg80211
vermagic: 3.16.0-31-generic SMP mod_unload modversions
parm: passivemode:int
parm: wl_txq_thresh:int
parm: oneonly:int
parm: piomode:int
parm: instance_base:int
parm: nompc:int
parm: intf_name:string
[iwlwifi]
filename: /lib/modules/3.16.0-31-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license: GPL
author: Copyright(c) 2003- 2014 Intel Corporation <[email protected]>
version: in-tree:
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-6.ucode
firmware: iwlwifi-6000g2a-5.ucode
firmware: iwlwifi-6050-5.ucode
firmware: iwlwifi-6000-4.ucode
firmware: iwlwifi-7265-9.ucode
firmware: iwlwifi-3160-9.ucode
firmware: iwlwifi-7260-9.ucode
firmware: iwlwifi-8000-8.ucode
srcversion: 7F17406EFFE91762CB15EEE
depends: cfg80211
intree: Y
vermagic: 3.16.0-31-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: A1:12:C1:8A:44:8A:56:00:47:EF:1F:4D:B7:4D:49:7F:61:A4:50:99
sig_hashalgo: sha512
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_8K:enable 8K amsdu size (default 0) (int)
parm: fw_restart:restart firmware in case of error (default true) (bool)
parm: antenna_coupling:specify antenna coupling in dB (defualt: 0 dB) (int)
parm: wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable (default: 1) (int)
parm: nvm_file:NVM file name (charp)
parm: uapsd_disable:disable U-APSD functionality (default: Y) (bool)
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)
[cfg80211]
filename: /lib/modules/3.16.0-31-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: 88153DA7841870E4F2012EE
depends:
intree: Y
vermagic: 3.16.0-31-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: A1:12:C1:8A:44:8A:56:00:47:EF:1F:4D:B7:4D:49:7F:61:A4:50:99
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 #################
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
probe_wait_ms: 500
[iwlwifi]
11n_disable: 0
amsdu_size_8K: 0
antenna_coupling: 0
bt_coex_active: Y
fw_monitor: N
fw_restart: Y
led_mode: 0
nvm_file: (null)
power_level: 0
power_save: N
swcrypto: 0
uapsd_disable: Y
wd_disable: 1
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
lp
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist-bcm43.conf]
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma
[/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 options iwlwifi 11n_disable=1
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
[/etc/modprobe.d/modesetting.conf]
options cirrus modeset=1
options mgag200 modeset=1
##### rc.local ##########################
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
exit 0
##### pm-utils ##########################
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:0x0887 (iwlwifi)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 21.796902] iwlwifi 0000:0a:00.0: L1 Enabled - LTR Disabled
[ 21.804697] iwlwifi 0000:0a:00.0: Radio type=0x2-0x0-0x0
[ 22.049316] iwlwifi 0000:0a:00.0: L1 Enabled - LTR Disabled
[ 22.057079] iwlwifi 0000:0a:00.0: Radio type=0x2-0x0-0x0
[ 22.129589] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 23.359471] wlan0: authenticate with <MAC 'm7md shw2y 01015665625' [AC1]>
[ 23.365286] wlan0: send auth to <MAC 'm7md shw2y 01015665625' [AC1]> (try 1/3)
[ 23.367166] wlan0: authenticated
[ 23.367288] wlan0: associate with <MAC 'm7md shw2y 01015665625' [AC1]> (try 1/3)
[ 23.371409] wlan0: RX AssocResp from <MAC 'm7md shw2y 01015665625' [AC1]> (capab=0x431 status=0 aid=3)
[ 23.374169] wlan0: associated
[ 23.374189] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
########## wireless info END ############
答案1
做：
sudo apt-get purge bcmwl-kernel-source
然后：
echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf
重启