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52

Cause This is caused by a regression introduced with a fix for libnl3 bug #1511735. Resulting network-manager crash has been reported in network-manager bug #1539513 or network-manager bug #1539634 Solution Downgrade libnl packages and wait for an upgrade of network-manager package Step 1 Try to downgrade libnl with apt-get as in @Max answer: sudo ...


4

Get onto a working machine (or plug into internet using an Ethernet cable) and download these three packages ... they are the working versions prior to recent broken release : wget http://mirrors.kernel.org/ubuntu/pool/main/libn/libnl3/libnl-3-200_3.2.21-1_amd64.deb wget ...


2

Networks are re-checked automatically. You do not need to press anything. You can wait for some seconds to see a new network. To re-check immidiately you do not need to restart Network Manager. You can click "Disable Wi-Fi" and "Enable Wi-Fi", if you are so impatient.


2

The correct driver for your device, wl, has gone missing. Let's try to reinstall it: sudo apt-get update sudo apt-get install --reinstall bcmwl-kernel-source sudo modprobe wl Please post any errors, warnings, etc. We see this: Module build for the currently running kernel was skipped since the kernel source for this kernel does not seem to be ...


2

Update to network-manager 0.9.8.8-0ubuntu7.2, and reboot. Hot workaround: using manual network settings over sudo nano /etc/network/interfaces Working workaround! Downgrade some libraries: 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


2

I had the same problem this morning and downgrading the libnl packages worked too. I rebooted using a rescue CD, downloaded libnl-3-200-3.2.21-1_amd64.deb, libnl-genl-3-200_3.2.21-1_amd64.deb and libnl-route-3-200_3.2.21-1_amd64.deb from http://archive.ubuntu.com/ubuntu/pool/main/libn/libnl3/ , installed it using dpkg -i and rebooted. Networking is back. ...


1

You need to update kernel and headers first. Run in terminal sudo apt-get install linux-generic Reboot and run: sudo apt-get install --reinstall bcmwl-kernel-source


1

Change 'deny' to 'allow' in : /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf The network-manager or the nm-applet is the one which is found in the systray. I used this page https://help.ubuntu.com/community/NetworkManager#Installation and did the following : sudo stop network-manager sudo apt-get install network-manager sudo apt-get install ...


1

In general, simple sudo ifconfig wlan0 down ...should be enough. Sometimes, wireless card can be shown as ethX instead of wlanY then you need to double check which ethX to disable and you can do it with sudo lshw -C network and look for your wireless card entry inside which you will find: logical name: <ethX_or_wlanY_goes_here> I guess ...


1

I've had the same problem on Ubuntu 15.04 and this solution works for me: Either remove all network interface (except lo) from /etc/network/interfaces so that it will be managed by the network manager or edit the /etc/NetworkManager/NetworkManager.conf, change the line managed=false to managed=true and restart the network manager (sudo service ...


1

If you have created the hot-spot correctly it should be able to use on a separate Windows computer & any mobile device! When I use my hot-spot (created on Ubuntu 14.04lts) My windows does not automatically detect it I must manually enter the "Hidden Networks" To see it & had to set it up in Windows "Network Settings" -> Create a network" This could ...


1

I had issues with the built-in network-manager based Hotspot since a long time, both related to compatibility and security. For instance, Android phones are able to connect only to Infrastructure APs which network-manager doesn't support out of the box (as you pointed out). That's the reason I've written my own Wifi Hotspot in python called hotspotd. Feel ...


1

Network Manager Crash on ubuntu 14.04 After upgrade from proposed repository the next packages: libnl-3-200, libnl-genl-3-200 and libnl-route-3-200. You'll need to downgrade your libnl-3 packages: sudo apt-get install libnl-3-200=3.2.21-1 libnl-genl-3-200=3.2.21-1 \ libnl-route-3-200=3.2.21-1 if you can not install these packages or have trouble ...


1

I could recover from the same problem by downgrading to the following packages (assuming the 64-bit version): libnl-3-200_3.2.21-1_amd64.deb libnl-genl-3-200_3.2.21-1_amd64.deb libnl-route-3-200_3.2.21-1_amd64.deb From a device with internet access download the above packages (e.g from packages.ubuntu.com) and find a way to transfer them to your ...


1

I had this issue with a VMware guest. The root cause is that I had the trusty-proposed repository enabled. I personally won't do that again. My resolution was to re-install. An option I took as it was a test virtual. As I understand it, a fix for a physical machine would be to sneakernet across the previous deb files to roll back the upgrade that broke ...



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