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[Marcelo Ruiz <1540088@xxxxxxxxxxxxxxxxxx>]

I am having the same problem. What helped me have back Internet access
was to bring up the interfaces and running dhclient from the command
line:

sudo ifconfig eth0 up
sudo dhclient

Replace eth0 with the interface you want to use.
This will not bring the applet back to life, but at list you will have Internet.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1540088

Title:
  NetworkManager crashes after upgrade, preventing nm-applet to show

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  After the last upgrade of Ubuntu 14.04.3 LTS , NetworkManager keeps
  crashing.

  after `sudo service network-manager start` I get the following output
  in dmesg:

  [2016-01-31 14:28:47]  traps: NetworkManager[11040] general protection ip:469fee sp:7ffc6879aa00 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11040) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11049] general protection ip:469fee sp:7ffecca7d9d0 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11049) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11062] general protection ip:469fee sp:7ffc218a9f50 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11062) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11076] general protection ip:469fee sp:7fff7f128270 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11076) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11088] general protection ip:469fee sp:7fff66528f90 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11088) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11092] general protection ip:469fee sp:7fffab819070 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11092) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11096] general protection ip:469fee sp:7ffe7aa91c20 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11096) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11100] general protection ip:469fee sp:7ffedfe81460 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11100) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11104] general protection ip:469fee sp:7ffdc475f140 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11104) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  traps: NetworkManager[11108] general protection ip:469fee sp:7ffdeb437010 error:0 in NetworkManager[400000+10d000]
  [2016-01-31 14:28:47]  init: network-manager main process (11108) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager main process ended, respawning
  [2016-01-31 14:28:47]  init: network-manager main process (11112) killed by SEGV signal
  [2016-01-31 14:28:47]  init: network-manager respawning too fast, stopped

  
  This problem prevents me to see nm-applet, and makes me unable to connect to WiFi network.

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