Internet disappears after few minutes

Question

I have a strange issue. I moved to another city with different Internet and now after being connected to Wi-fi for few minutes (~5) Internet stops working, but wi-fi is still connected. Disconnecting and connecting back does not help - no Internet. The only thing that works is to turn off networking completely and then turn it back on. After this procedure I can to connect to wifi with Internet, but Internet works only for several minutes and then I lose it again. A very strange issue, I never had it before (using Linux for ~10 years). Btw wifi works perfectly fine on Chromebook. Any suggestion? Thanks!

Here is my info generated using the script from here.

Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)

~$ iwconfig

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"BLABLA"  
      Mode:Managed  Frequency:2.437 GHz  Access Point: 68:EF:BD:2D:BE:A3   
      Bit Rate=72.2 Mb/s   Tx-Power=16 dBm   
      Retry  long limit:7   RTS thr:off   Fragment thr:off
      Power Management:off
      Link Quality=61/70  Signal level=-49 dBm  
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:0   Missed beacon:0

Is "Chromebook" a completely different computer? Or a program/OS on this computer? If it's a different computer, maybe there's something incompatible about your wifi adapter and the "new" router here...? i.e. can any OS stay connected on this hardware? — Xen2050, Jan 24 '15 at 06:02
Chromebook is a completely different computer. I will install Windows to see if it works. — Yuri, Jan 24 '15 at 16:39
On Windows Internet also disappears every few minutes, but I do not need to turn off networking, I can just reconnect. — Yuri, Jan 24 '15 at 17:05
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. http://askubuntu.com/questions/425155/my-wireless-wifi-connection-does-not-work- what-can-i-do — Wild Man, Jan 25 '15 at 17:23

Wild Man · Answer 1 · 2015-01-25T20:37:32.873

0

You have a few things that we can change to help your connection. First you have many networks in your area so their is a lot of channel congestion. Go into your router and try channel 2,4, or 9. We usually recommend 1,6 or 11 but to many other people are using those channel. Set encryption to just wpa2 AES personal not TKIP. Then save your router configuration.

Go into network manager top right corner of the screen and change IPV6 to ignore then reboot.

Edit:
Run

sudo iwlist scan

that will show all networks available find the Mac Address of the network you want to connect too then open network manager and put the Mac Address in the BSSID column, save the setting of network manager then reboot computer.

edited Jan 25 '15 at 20:37

answered Jan 25 '15 at 19:53

Wild Man

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Unfortunately I do not have access to the router. Also I tried to ignore IPv6, it did not help. – Yuri Jan 25 '15 at 19:56
I added more directions for you to try, that should work. – Wild Man Jan 25 '15 at 20:37
Unfortunately specifying MAC has no effect. – Yuri Jan 26 '15 at 01:34

Internet disappears after few minutes

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