我已经阅读了 askUbuntu 中的其他问题，但由于我是 Linux 新手，因此无法解决问题。
问题是 Ubuntu 14.04 上的 Wifi 连接非常不稳定。我不知道该怎么办。
下面是我的 Ubuntu 的信息。
########## wireless info START ##########
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.04.4 LTS
Release: 14.04
Codename: trusty
##### kernel ############################
Linux 3.19.0-58-generic #64~14.04.1-Ubuntu SMP Fri Mar 18 19:05:43 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, splash, quiet
##### desktop ###########################
Ubuntu
##### lspci #############################
02:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 130 [8086:0896] (rev 34)
Subsystem: Intel Corporation Centrino Wireless-N 130 BGN [8086:5005]
Kernel driver in use: iwlwifi
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
Subsystem: Samsung Electronics Co Ltd Device [144d:c606]
Kernel driver in use: r8169
##### lsusb #############################
Bus 002 Device 004: ID 8086:0189 Intel Corp.
Bus 002 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
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 003: ID 2232:1020 Silicon Motion
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
##### PCMCIA card info ##################
##### rfkill ############################
1: samsung-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
2: samsung-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
4: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
##### lsmod #############################
iwldvm 237568 0
mac80211 720896 1 iwldvm
iwlwifi 196608 1 iwldvm
cfg80211 532480 3 iwlwifi,mac80211,iwldvm
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr
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
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:37879 errors:0 dropped:0 overruns:0 frame:0
TX packets:37921 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:30064208 (30.0 MB) TX bytes:14271263 (14.2 MB)
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"N.W.A."
Mode:Managed Frequency:2.412 GHz Access Point:
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=47/70 Signal level=-63 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:657 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
##### network managers ##################
Installed:
NetworkManager
Running:
root 884 1 0 15:58 ? 00:00:00 NetworkManager
##### NetworkManager info ###############
NetworkManager Tool
State: connected (global)
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address:
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
- Device: wlan0 [N.W.A.] ------------------------------------------------------
Type: 802.11 WiFi
Driver: iwlwifi
State: connected
Default: yes
HW Address:
Capabilities:
Speed: 54 Mb/s
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points (* = current AP)
*N.W.A.: Infra, , Freq 2412 MHz, Rate 54 Mb/s, Strength 56 WPA2
IPv4 Settings:
Address: 192.168.1.100
Prefix: 24 (255.255.255.0)
Gateway: 192.168.1.1
DNS: 192.168.1.1
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
no-auto-default=,
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/N.W.A.]] (600 root)
[connection] id=N.W.A. | type=802-11-wireless
[802-11-wireless] ssid=N.W.A. | mac-address=
[ipv4] method=auto
[ipv6] method=auto
##### iwlist channels ###################
eth0 no frequency information.
lo no frequency information.
wlan0 11 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
Current Frequency:2.412 GHz (Channel 1)
##### iwlist scan #######################
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
Channel occupancy:
1 APs on Frequency:2.412 GHz (Channel 1)
wlan0 Scan completed :
Cell 01 - Address:
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=51/70 Signal level=-59 dBm
Encryption key:on
ESSID:"N.W.A."
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=00000009cb758c90
Extra: Last beacon: 80ms 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/3.19.0-58-generic/kernel/drivers/net/wireless/iwlwifi/dvm/iwldvm.ko
license: GPL
author: Copyright(c) 2003- 2014 Intel Corporation
version: in-tree:
description: Intel(R) Wireless WiFi Link AGN driver for Linux
srcversion: 734B867FAAD13922F696215
depends: iwlwifi,mac80211,cfg80211
intree: Y
vermagic: 3.19.0-58-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: DE:B3:43:0A:26:E6:7D:3D:3B:54:B9:DD:13:25:B3:3A:46:B2:F2:DD
sig_hashalgo: sha512
parm: force_cam:force continuously aware mode (no power saving at all) (bool)
[mac80211]
filename: /lib/modules/3.19.0-58-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: E4E96B72E71618C7054030A
depends: cfg80211
intree: Y
vermagic: 3.19.0-58-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: DE:B3:43:0A:26:E6:7D:3D:3B:54:B9:DD:13:25:B3:3A:46:B2:F2:DD
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)
[iwlwifi]
filename: /lib/modules/3.19.0-58-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license: GPL
author: Copyright(c) 2003- 2014 Intel Corporation
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-7265D-10.ucode
firmware: iwlwifi-7265-10.ucode
firmware: iwlwifi-3165-10.ucode
firmware: iwlwifi-3160-10.ucode
firmware: iwlwifi-7260-10.ucode
firmware: iwlwifi-8000-10.ucode
srcversion: 884420C3D4A6AC329614AEA
depends: cfg80211
intree: Y
vermagic: 3.19.0-58-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: DE:B3:43:0A:26:E6:7D:3D:3B:54:B9:DD:13:25:B3:3A:46:B2:F2:DD
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 (default: 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/3.19.0-58-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: EF182B558008C23DD85EF03
depends:
intree: Y
vermagic: 3.19.0-58-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: DE:B3:43:0A:26:E6:7D:3D:3B:54:B9:DD:13:25:B3:3A:46:B2:F2:DD
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 #################
[iwldvm]
force_cam: Y
[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
[iwlwifi]
11n_disable: 1
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
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
options iwlwifi 11n_disable=1
[/etc/modprobe.d/iwlwifi-opt.conf]
options iwlwifi 11n_disable=1
[/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 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:0x0896 (iwlwifi)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 612.341055] iwlwifi 0000:02:00.0: Radio type=0x2-0x2-0x1
[ 612.519278] r8169 0000:03:00.0 eth0: link down
[ 613.358528] wlan0: authenticate with
[ 613.359913] wlan0: send auth to (try 1/3)
[ 613.362406] wlan0: authenticated
[ 613.366523] wlan0: associate with (try 1/3)
[ 613.369445] wlan0: RX AssocResp from (capab=0x411 status=0 aid=2)
[ 613.372904] wlan0: associated
[ 614.216276] wlan0: deauthenticating from by local choice (Reason: 2=PREV_AUTH_NOT_VALID)
[ 614.219187] wlan0: authenticate with
[ 614.219920] wlan0: send auth to (try 1/3)
[ 614.221838] wlan0: authenticated
[ 614.223836] wlan0: associate with (try 1/3)
[ 614.226792] wlan0: RX AssocResp from (capab=0x411 status=0 aid=2)
[ 614.228701] wlan0: associated
[ 1797.075546] wlan0: deauthenticating from by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1801.522064] wlan0: authenticate with
[ 1801.522705] wlan0: send auth to (try 1/3)
[ 1801.525243] wlan0: authenticated
[ 1801.528624] wlan0: associate with (try 1/3)
[ 1801.531527] wlan0: RX AssocResp from (capab=0x411 status=0 aid=2)
[ 1801.533930] wlan0: associated
[ 2943.940899] wlan0: deauthenticating from by local choice (Reason: 3=DEAUTH_LEAVING)
[ 2948.828050] wlan0: authenticate with
[ 2948.828649] wlan0: send auth to (try 1/3)
[ 2948.831258] wlan0: authenticated
[ 2948.835080] wlan0: associate with (try 1/3)
[ 2948.837875] wlan0: RX AssocResp from (capab=0x411 status=0 aid=2)
[ 2948.840224] wlan0: associated
########## wireless info END ############
任何信息对我来说都非常重要。谢谢