Wie verhindere ich, dass mein WLAN ausfällt?

30

Ich habe ein System76 Gazelle, gapz8, mit Ubuntu 14.04. Mein WLAN fällt in unregelmäßigen Abständen aus. Ich habe einen neuen Router, daher glaube ich nicht, dass dies das Problem ist, aber ich befinde mich in einem Mehrfamilienhaus, sodass die Signale wahrscheinlich überfüllt sind. Mein Computer registriert das WLAN weiterhin als verbunden, sendet und empfängt jedoch keine Daten mehr. Ich habe festgestellt, dass das Trennen von der WLAN-Verbindung und das erneute Herstellen der Verbindung das Problem behebt, aber es kann innerhalb von Minuten wieder vorkommen. Versteht jemand das Problem oder wie man es behebt? Gerne gebe ich weitere Informationen, wenn das Problem dadurch behoben wird. Sagen Sie mir einfach, was.

Wie unten angefordert, werden die Ergebnisse aus dem "drahtlosen Skript" "

########## WLAN-Info START ##########

Bericht vom: 28 Sep 2014 23:17 EDT -0400

Zuletzt gebootet: 28. September 2014, 20:28 Uhr EDT -0400

Drehbuch vom: 20. September 2014 23:04 UTC +0000

##### Veröffentlichung ###########################

Händler ID: Ubuntu
Beschreibung: Ubuntu 14.04.1 LTS
Veröffentlichung: 14.04
Codename: vertrauenswürdig

##### Kernel #############################

Linux 3.13.0-36-generic # 63-Ubuntu SMP Mi Sep 3 21:30:07 UTC 2014 x86_64 x86_64 x86_64 GNU / Linux

Parameter: ro, quiet, splash, acpi_os_name = Linux, acpi_osi =, vt.handoff = 7

##### desktop ############################

Ubuntu

##### lspci #############################

02: 00.0 Netzwerkcontroller: Intel Corporation Centrino Wireless-N 2230 [8086: 0887] (Version c4)
    Subsystem: Centrino Wireless-N 2230 BGN der Intel Corporation [8086: 4062]
    Kerneltreiber im Einsatz: iwlwifi

03: 00.2 Ethernet-Controller: Realtek Semiconductor Co., Ltd. RTL8111 / 8168/8411 PCI-Express-Gigabit-Ethernet-Controller [10ec: 8168] (Version 0a)
    Subsystem: CLEVO / KAPOK-Computergerät [1558: 2706]
    Verwendeter Kerneltreiber: r8169

##### lsusb #############################

Bus 002 Gerät 003: ID 5986: 0401 Acer, Inc 
Bus 002 Gerät 002: ID 8087: 0024 Intel Corp. Integrierter Rate Matching Hub
Bus 002 Gerät 001: ID 1d6b: 0002 Linux Foundation 2.0-Root-Hub
Bus 001 Gerät 002: ID 8087: 0024 Intel Corp. Integrierter Rate Matching Hub
Bus 001 Gerät 001: ID 1d6b: 0002 Linux Foundation 2.0-Root-Hub
Bus 004 Gerät 001: ID 1d6b: 0003 Linux Foundation 3.0-Root-Hub
Bus 003 Gerät 002: ID 045e: 00e1 Empfänger der Microsoft Corp. Wireless Laser Mouse 6000
Bus 003 Gerät 001: ID 1d6b: 0002 Linux Foundation 2.0-Root-Hub

##### PCMCIA-Karteninfo #################

##### rfkill ############################

0: phy0: Wireless LAN
    Soft geblockt: nein
    Fest gesperrt: nein

##### lsmod #############################

iwldvm 232285 0 
mac80211 630653 1 iwldvm
iwlwifi 169932 1 iwldvm
cfg80211 484040 3 iwlwifi, mac80211, iwldvm
wmi 19177 0 

##### Schnittstellen #########################

auto lo
iface lo inet loopback

##### ifconfig ###########################

eth0 Linkkapsel: Ethernet HWaddr   
          UP BROADCAST MULTICAST MTU: 1500 Metrisch: 1
          Empfangspakete: 0 Fehler: 0 Verworfen: 0 Überschreitungen: 0 Rahmen: 0
          TX-Pakete: 0 Fehler: 0 verworfen: 0 Überläufe: 0 Träger: 0
          Kollisionen: 0 txqueuelen: 1000 
          RX-Bytes: 0 (0,0 B) TX-Bytes: 0 (0,0 B)

wlan0 Verbindungskapsel: Ethernet HWaddr   
          inet addr: 192.168.1.5 Bcast: 192.168.1.255 Mask: 255.255.255.0
          inet6 addr: fe80 :: 626c: 66ff: fe30: 1786/64 Gültigkeitsbereich: Link
          UP BROADCAST RUNNING MULTICAST MTU: 1500 Metrisch: 1
          RX-Pakete: 132928 Fehler: 0 verworfen: 0 Überläufe: 0 Frame: 0
          TX-Pakete: 81169 Fehler: 0 verworfen: 0 Überläufe: 0 Träger: 0
          Kollisionen: 0 txqueuelen: 1000 
          Empfangsbytes: 167705002 (167,7 MB) Sendebytes: 10766737 (10,7 MB)

##### iwconfig ###########################

eth0 keine drahtlosen Erweiterungen.

lo keine Funkerweiterungen.

wlan0 IEEE 802.11bgn ESSID: "Router 2: Electric Boogaloo"  
          Modus: Verwaltete Frequenz: 2,417 GHz Zugangspunkt:    
          Bitrate = 65 Mb / s Sendeleistung = 16 dBm   
          Langes Limit wiederholen: 7 RTS thr: off Fragment thr: off
          Energieverwaltung: Aus
          Verbindungsqualität = 63/70 Signalpegel = -47 dBm  
          Rx ungültig nwid: 0 Rx ungültig crypt: 0 Rx ungültig frag: 0
          Tx übermäßige Wiederholungsversuche: 0 Ungültige Sonstiges: 67 Verpasste Bake: 0

##### Route #############################

Kernel-IP-Routing-Tabelle
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

Zustand: verbunden (global)

- Gerät: eth0 ---------------------------------------------- -------------------
  Typ: Verkabelt
  Fahrer: r8169
  Zustand: nicht verfügbar
  Voreinstellung: nein
  HW-Adresse:        

  Fähigkeiten:
    Carrier Detect: ja

  Kabelgebundene Eigenschaften
    Träger: aus

- Gerät: wlan0 [Router 2: Electric Boogaloo] ---------------------------------
  Typ: 802.11 WiFi
  Fahrer: iwlwifi
  Zustand: verbunden
  Voreinstellung: ja
  HW-Adresse:        

  Fähigkeiten:
    Geschwindigkeit: 115 Mb / s

  Wireless-Eigenschaften
    WEP-Verschlüsselung: ja
    WPA-Verschlüsselung: ja
    WPA2-Verschlüsselung: ja

  Wireless Access Points (* = aktueller AP)
    Lucille: Infra, Frequenz 2427 MHz, Rate 54 Mb / s, Stärke 75 WPA WPA2
    DG1670A82: Infra, Frequenz 2437 MHz, Rate 54 Mb / s, Stärke 62 WPA2
    Mcchacko-2G: Infra, Frequenz 2412 MHz, Rate 54 Mb / s, Stärke 52 WPA2
    DIRECT-roku-900: Infra, Freq 2437 MHz, Rate 54 Mb / s, Stärke 50 WPA2
    B4R87: Infra, Frequenz 2437 MHz, Rate 54 Mb / s, Stärke 44 WPA2
    NETGEAR65: Infra, Frequenz 2437 MHz, Rate 54 Mb / s, Stärke 42 WPA2
    frech: Infra,, Freq 2462 MHz, Rate 54 Mb / s, Stärke 27 WPA2
    DG1670A22: Frequenz 2412 MHz, Frequenz 54 Mb / s, Stärke 25 WPA2
    * Router 2: Electric Boogaloo: Infra, Freq 2417 MHz, Rate 54 Mb / s, Stärke 77 WPA2
    Wellfords: Frequenz 2412 MHz, Frequenz 54 Mb / s, Stärke 57 WPA WPA2
    RubyWillow: Infra, Freq 2437 MHz, Rate 54 Mb / s, Stärke 40 WPA WPA2
    Waffelhaus: Infra,, Frequenz 2412 MHz, Rate 54 Mb / s, Stärke 27 WPA WPA2
    Linksys e3200: Infra, Frequenz 2412 MHz, Rate 54 Mb / s, Stärke 27 WPA WPA2
    RubyWillow-Gast: Infra, Freq 2437 MHz, Rate 54 Mb / s, Stärke 45
    TG1672G12: Infra, Frequenz 2427 MHz, Rate 54 Mb / s, Stärke 34 WPA2
    55B2Q: Frequenz 2462 MHz, Frequenz 54 Mb / s, Stärke 34 WPA2
    Luna: Infra, Frequenz 2437 MHz, Rate 54 Mb / s, Stärke 30 WPA WPA2
    Linksys e3200-Gast: Infra, Freq 2412 MHz, Rate 54 Mb / s, Stärke 27

  IPv4-Einstellungen:
    Adresse: 192.168.1.5
    Präfix: 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

[ifupdown]
verwaltet = falsch

##### NetworkManager-Profile ###########

[[/ etc / NetworkManager / system-connections / Apple Network 5df1bd]] (600 root)
[connection] id = Apple Network 5df1bd | Typ = 802-11-Wireless
[802-11-wireless] ssid = Apple Network 5df1bd | MAC-Adresse =
[ipv4] method = auto
[ipv6] method = auto

[[/ etc / NetworkManager / system-connections / 200W102nd3E]] (600 root)
[connection] id = 200W102nd3E | Typ = 802-11-Wireless
[802-11-wireless] ssid = 200W102nd3E | MAC-Adresse =
[ipv4] method = auto
[ipv6] method = auto

[[/ etc / NetworkManager / system-connections / NETGEAR49]] (600 root)
[connection] id = NETGEAR49 | Typ = 802-11-Wireless
[802-11-wireless] ssid = NETGEAR49 | MAC-Adresse =
[ipv4] method = auto
[ipv6] method = auto

[[/ etc / NetworkManager / system-connections / NYU-ROAM3]] (600 root)
[connection] id = NYU-ROAM3 | Typ = 802-11-Wireless
[802-11-wireless] ssid = NYU-ROAM3 | MAC-Adresse =
[ipv6] method = auto
[ipv4] method = auto

[[/ etc / NetworkManager / system-connections / Router 2: Electric Boogaloo]] (600 root)
[connection] id = Router 2: Electric Boogaloo | Typ = 802-11-Wireless
[802-11-wireless] ssid = Router 2: Electric Boogaloo | MAC-Adresse =
[ipv4] method = auto
[ipv6] method = auto

##### iw reg get #########################

Region: America / New_York (basierend auf der eingestellten Zeitzone)

Land 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 keine Frequenzinformation.

lo keine Frequenzinformation.

wlan0 13 kanäle insgesamt; verfügbare Frequenzen:
          Kanal 01: 2,412 GHz
          Kanal 02: 2,417 GHz
          Kanal 03: 2,422 GHz
          Kanal 04: 2,427 GHz
          Kanal 05: 2,432 GHz
          Kanal 06: 2,437 GHz
          Kanal 07: 2,442 GHz
          Kanal 08: 2,447 GHz
          Kanal 09: 2,452 GHz
          Kanal 10: 2,457 GHz
          Kanal 11: 2,462 GHz
          Kanal 12: 2,467 GHz
          Kanal 13: 2,472 GHz
          Aktuelle Frequenz: 2.417 GHz (Kanal 2)

##### iwlist scan ########################

Kanalbelegung:

      2 APs mit einer Frequenz von 2,412 GHz (Kanal 1)
      1 APs auf Frequenz: 2,417 GHz (Kanal 2)
      1 APs auf Frequenz: 2,427 GHz (Kanal 4)
      7 APs mit einer Frequenz von 2,437 GHz (Kanal 6)
      1 APs auf Frequenz: 2,457 GHz (Kanal 10)
      1 APs auf Frequenz: 2,462 GHz (Kanal 11)

Die eth0-Schnittstelle unterstützt kein Scannen.

lo Das Interface unterstützt kein Scannen.

wlan0 Scan abgeschlossen:
          Zelle 01 - Adresse: 
                    Kanal: 2
                    Frequenz: 2,417 GHz (Kanal 2)
                    Qualität = 60/70 Signalpegel = -50 dBm  
                    Verschlüsselungscode: Ein
                    ESSID: "Router 2: Elektrisches Boogaloo"
                    Bitraten: 1 Mb / s; 2 Mb / s; 5,5 Mb / s; 11 Mb / s; 6 Mb / s
                              9 Mb / s; 12 Mb / s; 18 Mb / s
                    Bitraten: 24 Mb / s; 36 Mb / s; 48 Mb / s; 54 Mb / s
                    Modus: Meister
                    Extra: tsf = 0000000226ee9d93
                    Extra: Letztes Leuchtfeuer: vor 44ms
                    IE: IEEE 802.11i / WPA2 Version 1
                        Gruppenchiffre: CCMP
                        Paarweise Chiffren (1): CCMP
                        Authentifizierungssuiten (1): PSK
          Zelle 02 - Adresse: 
                    Kanal 1
                    Frequenz: 2,412 GHz (Kanal 1)
                    Qualität = 44/70 Signalpegel = -66 dBm  
                    Verschlüsselungscode: Ein
                    ESSID: "Mcchacko-2G"
                    Bitraten: 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
                    Bitraten: 6 Mb / s; 12 Mb / s; 24 Mb / s; 48 Mb / s
                    Modus: Meister
                    Extra: tsf = 00000051d26350a2
                    Extra: Letztes Leuchtfeuer: vor 44ms
                    IE: IEEE 802.11i / WPA2 Version 1
                        Gruppenchiffre: CCMP
                        Paarweise Chiffren (1): CCMP
                        Authentifizierungssuiten (1): PSK
          Zelle 03 - Adresse: 
                    Kanal 1
                    Frequenz: 2,412 GHz (Kanal 1)
                    Qualität = 48/70 Signalpegel = -62 dBm  
                    Verschlüsselungscode: Ein
                    ESSID: "Wellfords"
                    Bitraten: 1 Mb / s; 2 Mb / s; 5,5 Mb / s; 11 Mb / s; 18 Mb / s
                              24 Mb / s; 36 Mb / s; 54 Mb / s
                    Bitraten: 6 Mb / s; 9 Mb / s; 12 Mb / s; 48 Mb / s
                    Modus: Meister
                    Extra: tsf = 00000000bfdb08ba
                    Extra: Letztes Leuchtfeuer: vor 44ms
                    IE: IEEE 802.11i / WPA2 Version 1
                        Gruppenchiffre: TKIP
                        Paarweise Chiffren (2): CCMP TKIP
                        Authentifizierungssuiten (1): PSK
                    IE: WPA Version 1
                        Gruppenchiffre: TKIP
                        Paarweise Chiffren (2): CCMP TKIP
                        Authentifizierungssuiten (1): PSK
          Cell 04 - Address: 
                    Channel:4
                    Frequency:2.427 GHz (Channel 4)
                    Quality=58/70  Signal level=-52 dBm  
                    Encryption key:on
                    ESSID:"Lucille"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000001d3ad33a1d
                    Extra: Last beacon: 44ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
          Cell 05 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=44/70  Signal level=-66 dBm  
                    Encryption key:on
                    ESSID:"RubyWillow"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=000000d59bbc1370
                    Extra: Last beacon: 44ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
          Cell 06 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=50/70  Signal level=-60 dBm  
                    Encryption key:on
                    ESSID:"NETGEAR65"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000002fda7d406be
                    Extra: Last beacon: 44ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 07 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=32/70  Signal level=-78 dBm  
                    Encryption key:on
                    ESSID:"luna"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000007386e99
                    Extra: Last beacon: 692ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
          Cell 08 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=53/70  Signal level=-57 dBm  
                    Encryption key:on
                    ESSID:"DG1670A82"
                    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=000002913cbce2ae
                    Extra: Last beacon: 44ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 09 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=41/70  Signal level=-69 dBm  
                    Encryption key:on
                    ESSID:"DIRECT-roku-900"
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000001bb4835fa76
                    Extra: Last beacon: 44ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 10 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=44/70  Signal level=-66 dBm  
                    Encryption key:off
                    ESSID:"RubyWillow-guest"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=000000d59bbc2e70
                    Extra: Last beacon: 44ms ago
          Cell 11 - Address: 
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=36/70  Signal level=-74 dBm  
                    Encryption key:on
                    ESSID:"B4R87"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=00000077da1f65f7
                    Extra: Last beacon: 44ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 12 - Address: 
                    Channel:10
                    Frequency:2.457 GHz (Channel 10)
                    Quality=24/70  Signal level=-86 dBm  
                    Encryption key:on
                    ESSID:"Trust but Verify 2"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000002b08ecdcda
                    Extra: Last beacon: 480ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 13 - Address: 
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=30/70  Signal level=-80 dBm  
                    Encryption key:on
                    ESSID:"cheeky"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000001c711ca046e
                    Extra: Last beacon: 44ms 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/3.13.0-36-generic/kernel/drivers/net/wireless/iwlwifi/dvm/iwldvm.ko
license:        GPL
author:         Copyright(c) 2003-2013 Intel Corporation 
version:        in-tree:
description:    Intel(R) Wireless WiFi Link AGN driver for Linux
srcversion:     CC4D1BA11C1EF73A6ABDE53
depends:        iwlwifi,mac80211,cfg80211
intree:         Y
vermagic:       3.13.0-36-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        38:F3:B6:C6:3A:85:AF:FD:FB:BE:0E:53:33:9D:F8:E0:C6:B6:C9:D5
sig_hashalgo:   sha512

[mac80211]
filename:       /lib/modules/3.13.0-36-generic/kernel/net/mac80211/mac80211.ko
license:        GPL
description:    IEEE 802.11 subsystem
srcversion:     B822641624778B987844F6F
depends:        cfg80211
intree:         Y
vermagic:       3.13.0-36-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        38:F3:B6:C6:3A:85:AF:FD:FB:BE:0E:53:33:9D:F8:E0:C6:B6:C9:D5
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)

[iwlwifi]
filename:       /lib/modules/3.13.0-36-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license:        GPL
author:         Copyright(c) 2003-2013 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-7265-7.ucode
firmware:       iwlwifi-3160-7.ucode
firmware:       iwlwifi-7260-7.ucode
srcversion:     C2D0F3DFCA289585C100E36
depends:        cfg80211
intree:         Y
vermagic:       3.13.0-36-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        38:F3:B6:C6:3A:85:AF:FD:FB:BE:0E:53:33:9D:F8:E0:C6:B6:C9:D5
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, 2=enable (default: 0) (int)
parm:           nvm_file:NVM file name (charp)
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)

[cfg80211]
filename:       /lib/modules/3.13.0-36-generic/kernel/net/wireless/cfg80211.ko
description:    wireless configuration support
license:        GPL
author:         Johannes Berg
srcversion:     C2478077E22138832B71659
depends:        
intree:         Y
vermagic:       3.13.0-36-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        38:F3:B6:C6:3A:85:AF:FD:FB:BE:0E:53:33:9D:F8:E0:C6:B6:C9:D5
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_restart: Y
led_mode: 0
nvm_file: (null)
power_level: 0
power_save: N
swcrypto: 0
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

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

exit 0

##### pm-utils ##########################

[/etc/pm/power.d/wireless] (755 root)
/sbin/iwconfig wlan0 power off

##### 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 0x8086:0x0887 (iwlwifi)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

##### dmesg #############################

[ 6007.775779] iwlwifi 0000:02:00.0: RF_KILL bit toggled to enable radio.
[ 6011.128079] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[ 6011.136901] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0
[ 6011.203681] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 6012.329356] wlan0: authenticate with 
[ 6012.334173] wlan0: send auth to  (try 1/3)
[ 6012.336306] wlan0: authenticated
[ 6012.336744] wlan0: associate with  (try 1/3)
[ 6012.341336] wlan0: RX AssocResp from  (capab=0x431 status=0 aid=3)
[ 6012.364839] wlan0: associated
[ 6012.364893] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 6012.384107] wlan0: deauthenticating from  by local choice (reason=2)
[ 6012.408121] wlan0: authenticate with 
[ 6012.412092] wlan0: send auth to  (try 1/3)
[ 6012.414214] wlan0: authenticated
[ 6012.416765] wlan0: associate with  (try 1/3)
[ 6012.421359] wlan0: RX AssocResp from  (capab=0x431 status=0 aid=3)
[ 6012.443977] wlan0: associated

########## wireless info END ############
14.04 networking wireless realtek-wireless bigcat42
quelle
This does sound like a network/router issue.
Kaz Wolfe
Have you looked at the log files in /var/log? Try grep NetworkManager /var/log/syslog*, and spend some time trying to understand the messages before reposting. Also, read the "Related" problems along the right side of this screen.
waltinator
1
Please run the script that is in the accepted answer in the link below so we may see the information needed to help diagnose the issue. <askubuntu.com/questions/425155/…>
Wild Man
@Whaaaaaat I've recently replaced both the router and the cable box. Anything beyond that belongs to Time Warner Cable. Even if it is TWC's fault, there must be something I can do to make my laptop more resilient to these interruptions, make it better at reconnecting. If I disconnect and reconnect, the wifi works again, so why can't my laptop do that itself?
bigcat42
1
I have this same symptom on a dual boot with windows 8 and finally upgraded to windows 10 and that system doesn't have any issues with the router. Neither does any other machine on the same wifi. Just when I'm in ubuntu.
Jason Kleban

Antworten:

25

Run the following commands, one line at a time in the terminal (CTRL+ALT+T):

echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
sudo modprobe -rfv iwldvm
sudo modprobe -rfv iwlwifi
sudo modprobe -v iwlwifi

What does this do? The 11n_disable option disables 802.11n features. Adding it to /etc/modprobe.d/iwlwifi.conf makes the change persist after reboots (because it will be part of the module config). The modprobe -rfv commands are removing the kernel modules iwldvm and iwlwifi, and finally the last line modprobe -v is adding iwlwifi back in.

To know what those kernel modules are/do, you can run modinfo <module name> | grep description, which will tell you the following:

iwlwifi is an Intel(R) Wireless WiFi driver for Linux (generic Intel drivers)

iwldvm is Intel(R) Wireless WiFi Link AGN driver for Linux (more specific drivers)

Other suggestions

Now, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, You may have better luck with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. After making these changes, you may need to reboot the router.

Wild Man
quelle
11
I would appreciate some references before I go blindly modifying system configurations.
ThorSummoner
7
@ThorSummoner you have a good point there. I've just edited the answer to explain what each line does
Enrico
1
my wifi only randomly drops out when connect using wpa2 enterprise, if I'm using wpa2 personal it's just fine, any suggestion?
Ahmad Muzakki
1
I got an error saying that iwlwifi.conf is in use. Although simply skipping the last three steps seemed to fix my problem anyway.
Abe Petrillo
How to undo the changes in the post?
mahmood
16

Change the wireless setting of IPv6. I tried it with my laptop, which has been continually dropping the connection, and so far, all day long, I have not had a single dropout! It seems to be working. In Ubuntu, in the top right, click on the wireless network icon that shows connectivity. In the dropdown menu, at the bottom, select "edit connections" and then highlight your wireless connection name. Choose edit, then select the IPv6 tab (to the right of the IPv4 tab) and change the setting from "automatic" to "ignore". Save and exit. Reboot your PC. That took care of my problem, and hopefully will yours, too.

D. Thomas
quelle
1
This also worked for me with Ubuntu 16.04
David Bosschaert
1
Can someone explain to me why this works?
YellowPillow
5

Edit the wireless settings, set the IPv6 method to "ignore".

This may be a very simple solution to this problem. My 12.04 wireless connection dropped out every few minutes when connected over Comcast and sometimes also in hotels. This happened consistently on different Comcast wireless setups. On many other wireless setups, it was solid (in my workplace, at Starbucks, for example).

After struggling with many complicated fixes, I finally stumbled across the above solution: No more dropouts.

Edit by cipricus to add images (in KDE Plasma 5.8 interface):

enter image description here

enter image description here

enter image description here

Dana Yoerger
quelle
1
In 12.04, click on the network icon in the top right tool bar. Select "edit connections" and go to wireless. Select the connection in question, p ush the "edit" button to the right. Then go to IPv6 settings and select "ignore" under "method". Hit save. Problem over.
Dana Yoerger
2
Much better! :-) Can you now edit your answer and put it there instead of the comments here and then delete your comment? (My original comment already deleted) ;-)
Fabby
1
I don't have the "ignore option" on linux mint. Is it possible to have this option somewhere else?
Karl Adler
@abimelex you might try editing the config file in /etc/NetworkManager/system-connections/
pomsky
2
Ubuntu 17.10 does not have a GUI "ignore" option. It does have a "Disable" option; inspecting the /etc/NetworkManager/system-connections/* I can confirm that this translates into the same method=ignore. Unfortunately this did not fix things for me.
josephwb
1

I found a good article on this at: http://itsfoss.com/speed-up-slow-wifi-connection-ubuntu/

I tried steps 1 through 4, but in the end step 5 (installing WICD) is what worked for me.

I'll quote that section here since it's a solution that I didn't see in the prior answers here:

SOLUTION 5: DITCH DEFAULT NETWORK MANAGER AND EMBRACE WICD "Slow or inconsistent wireless connection, in some cases, are also due to Ubuntu’s very own default network manager. I am not sure what causes this but I have seen people in Ubuntu Forums talking about this problem in especially in Ubuntu 12.04. You can install Wicd, an alternate and a better network manager from Ubuntu Software Centre or from terminal. For details on how to use Wicd, you can read my other article which I used to find SSID of wireless networks in Ubuntu."

To clarify, after installing WICD, my WIFI is I think getting disconnected a little less frequently (it was about every 20 minutes), but the big difference is that I previously had to go disable WIFI and then re-enable WIFI to reestablish my internet connection. Now with WICD it just automatically (and pretty much transparently) reconnects within a few seconds.

Shawn
quelle
0

Hi If you are dual booting or using a PC, firstly ensure your Ethernet does not turn off connection to save power, may not be The Solution but it is one step closer. there are 2 that need turning off. Do this Control Panel/device manager/Network adapters right click Properties / power management/ Un-tick "Allow computer to turn Off this device to save power" Since Windows95 it is always ticked by Default and often when one recovers from a crash it is ticked again and needs to be turned off. Hope it helps

TomTom
quelle
This is a Windows-based answer to a Linux-based question.
flith
-1

My quick and dirty hack

My wifi adapter (Realtek RTL8188CUS) is just angry with Ubuntu and no real solution worked, so I ping my router every 5s:

ping 192.168.0.1 -i 5

...and the connection stays on.

Nelo_j
quelle
This intrigued me. I thought this might give some hints on underlying causes, so I tried it before trying other things. However, I'd say inconclusive/unhelpful: when I left for an hour and returned, the ping had started giving ping: sendmsg: Network is unreachable
sage
This will work if your problem is hardware going to some sleep-mode or low-power state (forcing it to remain active). It won't help if there is some issue with the hardware itself or the driver; it's like pinging the router on a wired connecting and expecting it to help if somebody disconnects the network cable. I would suggest this is some power-saving setting specific to the RTL8188 driver.
flith