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I updated recently to 14.04 from 13.10, everything seemed to work fine, but after the second reboot the system connects to the network, but no internet is working.

I tried already plenty of solutions from Askubuntu.com, but nothing seems to work.

My computer is a ACER Aspire V5-573G. I am using an Qualcomm Atheros AR9462 Wifi-Network card (PCI).

I did already the following:

  • I downloaded the newest backports, copied it to my system and tried to install them with: "make defconfig-ath9k" and also "make defconfig-rtlwifi", but it didn't help, yet.
  • I checked rfkill, but everything fine there.
  • I changed the wifi channel to 1, did't help.
  • I added to modprobe (ath9k.conf) the following line "nohwcrypt=1 blink=1 btcoex_enable=1"

My system is as actual as it could be, so no header download necessary.

After several reboots and further tweaking I can't even find my wifi in the menu now, it vanished, I guess that's not a good sign. Damn it I am totally lost.

So, please help.

Best regards,

Tom

Note: I also did the following in the terminal: sudo sed -i '/exit 0/i iwconfig wlan0 rate 11M' /etc/rc.local

Thomas Liller
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2 Answers2

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This may be due to incomplete updating try to connect to the wifi from command line, following links will guide you how to do that.

How do I connect to a WPA wifi network using the command line?

iwconfig usage for WEP access point?

If you are able to connect it will identify the problem was in updates. Then you can use sudo apt-get update and subsequently upgrade to take care of the issue

Community
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Rishabh
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Please try the following

vi /etc/NetworkManager/NetworkManager.conf

change managed=false to managed=true.

From the top-right corner select Edit Connections, and add a new connection. Specify your ip address, netmask, gateway, and the DNS server being 8.8.8.8.

Then add these two lines to /etc/resolv.conf

nameserver 8.8.8.8
nameserver 8.8.4.4

Then run:

sudo service network-manager restart.

Else try the following

gksu gedit /etc/network/interfaces

Add the below lines to the file:

auto eth0
iface eth0 inet dhcp

Hope this helps!

BDRSuite
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