internet connection on wifi stops working after some time

[Villabacho]

Hi folks,

I recently installed linuxmint 17.2 rafaela on my girlfriend's thinkpad x220.

Everything is working smoothely except that the internet connection stops working from time to time.
the network manager says that I'm connected to wifi but I can't load any pages. I have to reboot to get it running again.

if I can't get this problem solved my girlfriend will force me to switch her laptop back to windows!!
Can somebody help me?


i am running on this kernel version: 3.16.0-38

Exact linux version info:
RELEASE=17.2
CODENAME=rafaela
EDITION="Cinnamon 64-bit"
DESCRIPTION="Linux Mint 17.2 Rafaela"
DESKTOP=Gnome
TOOLKIT=GTK
NEW_FEATURES_URL=http://www.linuxmint.com/rel_rafaela_ci ... atsnew.php
RELEASE_NOTES_URL=http://www.linuxmint.com/rel_rafaela_cinnamon.php
USER_GUIDE_URL=help:linuxmint
GRUB_TITLE=Linux Mint 17.2 Cinnamon 64-bit


sudo /usr/lib/linuxmint/mintWifi/mintWifi.py
gives me the following output

* I. scanning WIFI PCI devices...
-- Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)
==> PCI ID = 8086:0085 (rev 34)
-------------------------
* II. querying ndiswrapper...
-------------------------
* III. querying iwconfig...
eth0 no wireless extensions.

wlan0 IEEE 802.11abgn ESSID:"ThisWayUp"
Mode:Managed Frequency:2.447 GHz Access Point: 84:94:8C:6B:89:A8
Bit Rate=72.2 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=69/70 Signal level=-41 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:231 Missed beacon:0

lo no wireless extensions.

-------------------------
* IV. querying ifconfig...
eth0 Link encap:Ethernet Hardware Adresse f0f1:76:9a:aa
UP BROADCAST MULTICAST MTU:1500 Metrik:1
RX-Pakete:0 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
TX-Pakete:0 Fehler:0 Verloren:0 Überläufe:0 Träger:0
Kollisionen:0 Sendewarteschlangenlänge:1000
RX-Bytes:0 (0.0 B) TX-Bytes:0 (0.0 B)
Interrupt:20 Speicher:f2500000-f2520000

eth0:avahi Link encap:Ethernet Hardware Adresse f0f1:76:9a:aa
inet Adresse:169.254.10.221 Bcast:169.254.255.255 Maske:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metrik:1
Interrupt:20 Speicher:f2500000-f2520000

lo Link encap:Lokale Schleife
inet Adresse:127.0.0.1 Maske:255.0.0.0
inet6-Adresse: ::1/128 Gültigkeitsbereich:Maschine
UP LOOPBACK RUNNING MTU:65536 Metrik:1
RX-Pakete:1839 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
TX-Pakete:1839 Fehler:0 Verloren:0 Überläufe:0 Träger:0
Kollisionen:0 Sendewarteschlangenlänge:0
RX-Bytes:213326 (213.3 KB) TX-Bytes:213326 (213.3 KB)

wlan0 Link encap:Ethernet Hardware Adresse a0:88:b4:a1:bb:2c
inet Adresse:192.168.0.11 Bcast:192.168.0.255 Maske:255.255.255.0
inet6-Adresse: 2a02:8109:97c0:8f4:c90c:26d8:32be:22eb/64 Gültigkeitsbereich:Global
inet6-Adresse: fe80::a288:b4ff:fea1:bb2c/64 Gültigkeitsbereich:Verbindung
inet6-Adresse: 2a02:8109:97c0:8f4::3/128 Gültigkeitsbereich:Global
inet6-Adresse: 2a02:8109:97c0:8f4:a288:b4ff:fea1:bb2c/64 Gültigkeitsbereich:Global
inet6-Adresse: fd00:8494:8c6b:89a2:c90c:26d8:32be:22eb/64 Gültigkeitsbereich:Global
inet6-Adresse: fd00:8494:8c6b:89a2:a288:b4ff:fea1:bb2c/64 Gültigkeitsbereich:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX-Pakete:104590 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
TX-Pakete:34456 Fehler:0 Verloren:0 Überläufe:0 Träger:0
Kollisionen:0 Sendewarteschlangenlänge:1000
RX-Bytes:134882701 (134.8 MB) TX-Bytes:5479912 (5.4 MB)

-------------------------
* V. querying DHCP...
RTNETLINK answers: File exists
-------------------------
* VI. querying nslookup google.com...
Server: 192.168.0.1
Address: 192.168.0.1#53

Non-authoritative answer:
Name: google.com
Address: 64.233.166.100
Name: google.com
Address: 64.233.166.101
Name: google.com
Address: 64.233.166.138
Name: google.com
Address: 64.233.166.113
Name: google.com
Address: 64.233.166.139
Name: google.com
Address: 64.233.166.102

[JeremyB]

I would go into Network Manager and set IPv6 to ignore or disabled. Check your wifi router settings, you want encryption to be WPA2 only, WPA2-PSK, or WPA2-AES...no WEP or TKIP...check

Code: Select all

iwlist scan

then find your wifi in the list and look for group and pairwise ciphers, you want both to be CCMP only.

The only other thing I can think of is

Code: Select all

echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

Reboot as this usually helps by enabling aggressive TX for wireless N

[Villabacho]

I would go into Network Manager and set IPv6 to ignore or disabled. Check your wifi router settings, you want encryption to be WPA2 only, WPA2-PSK, or WPA2-AES...no WEP or TKIP...check

Code: Select all

iwlist scan

then find your wifi in the list and look for group and pairwise ciphers, you want both to be CCMP only.

The only other thing I can think of is

Code: Select all

echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

Reboot as this usually helps by enabling aggressive TX for wireless N

hi jeremy.
thanks for your quick response.
I disabled ipv6 and set encryption to ccmp only. let's see if that helps.

What about the last part? what does it do? disable 11n i think i disabled that anyway.
I tested differnt kinds of router settings and found that b/g/n is the quickest. when i use g only my speed goes down, same for n only and b only as well as g/n or b/g

[JeremyB]

I would go into Network Manager and set IPv6 to ignore or disabled. Check your wifi router settings, you want encryption to be WPA2 only, WPA2-PSK, or WPA2-AES...no WEP or TKIP...check

Code: Select all

iwlist scan

then find your wifi in the list and look for group and pairwise ciphers, you want both to be CCMP only.

The only other thing I can think of is

Code: Select all

echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

Reboot as this usually helps by enabling aggressive TX for wireless N

hi jeremy.
thanks for your quick response.
I disabled ipv6 and set encryption to ccmp only. let's see if that helps.

What about the last part? what does it do? disable 11n i think i disabled that anyway.
I tested differnt kinds of router settings and found that b/g/n is the quickest. when i use g only my speed goes down, same for n only and b only as well as g/n or b/g

The last code can actually increase the transmit speed over wireless-N by up to 60%, on one of my laptops I cannot even connect to a wireless-N only network without that being set

[Villabacho]

well the first part didn't really solve the problem.

i also tried the last line of code just now. it seems that my internet connection is faster. But that might be a subjective impression.

i#ll wait and see if my problem reoccurs..

Stefan

I would go into Network Manager and set IPv6 to ignore or disabled. Check your wifi router settings, you want encryption to be WPA2 only, WPA2-PSK, or WPA2-AES...no WEP or TKIP...check

Code: Select all

iwlist scan

then find your wifi in the list and look for group and pairwise ciphers, you want both to be CCMP only.

The only other thing I can think of is

Code: Select all

echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

Reboot as this usually helps by enabling aggressive TX for wireless N

[salman]

hey dear,
im also facing the same problem n hv tried all the soln which u hv gvn.
bt still im facing the same problem...
plz gv me some another soln....as i hv to restsrt my laptop for wifi intrnt conn.
plz reply