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Running latest 14.04 plus all fixes up to and including 28th Jan 2016, all network connectivity gone on re-boot. My guess is it was the last lot of updates which where some lib files.

Installed files which might be the problem:

network-manager-gnome 0.9.8.8-0ubuntu4.4
libnm-util2 0.9.8.8-0ubuntu7.2.

It might be libnm-util was in the last update set but not sure. This is a very serious problem. How can I fix this without network connectivity?

andrew.46
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tobiz
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3 Answers3

1

Same problem here (Ubuntu 14.04LTS)! Please notice, there is already a different thread #727127.

While this does not fix the problem, for me it helped to do a manual configuration of the wlan interface, e.g. to edit

sudo vi /etc/network/interfaces

I followed the example given here (see 3.2). The page gives some other information and additional steps, which were not necessary in my case.

/etc/network/interfaces:

auto wlan0
iface wlan0 inet dhcp
wpa-driver wext
wpa-ssid your_network_ssid
wpa-psk your_network_psk
# if your SSID is hidden, change value to 2
wpa-ap-scan 1
# type WPA for WPA1, RSN for WPA2
wpa-proto RSN
# type CCMP for AES, TKIP for TKIP
wpa-pairwise CCMP
# type CCMP for AES, TKIP for TKIP
wpa-group CCMP
# type WPA-PSK for shared key (most common), WPA-EAP for enterprise radius server
wpa-key-mgmt WPA-PSK

I simply adjusted the settings for wpa-ssid and wpa-psk followed by a reboot. With that, at least I got a working wifi connection back. And I can hope now for a fix, which I will be able to download, when it becomes available.

Community
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kermit0611
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It's an upgrade bug. As explained here, you have to downgrade some packages to have your network working again... Hope that Ubuntu Staff will solve the problem soon.

sudo apt-get install libnl-3-200=3.2.21-1 libnl-route-3-200=3.2.21-1 libnl-genl-3-200=3.2.21-1

It worked like a charm for me on Ubuntu 14.04. Hope that help. Rgds

Community
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Stef
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you will need the ISO image of Ubuntu

Insert cdrom Ubuntu

Go to Unity Dash and look for Software & Updates

In the first tab Ubuntu Software, check the option of CD Rom with Ubuntu

Next is to go in Additional Drivers tab and select the propriety driver and click on Apply Changes

Once the drivers have been installed, you’ll see that Ubuntu now recognizes the wireless networks in range.

GAD3R
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