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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1721880

and then change the status of the bug to 'Confirmed'.

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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1721880

Title:
  can't disable wi-fi and system hangs on shutdown

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  If I try to turn off wi-fi the system freezes for few seconds and after that 
internet is not working and I can't open settings anymore, even if the wi-fi 
tray icon still shows a connection.
  When I shutdown the system it says that "A stop job for network-manager and 
wpa supplicant is running" and I have to wait for 10-11 minutes. Suspension 
doesn't work neither.
  Everything was working just fine on 17.10 daily builds.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: network-manager 1.8.4-1ubuntu1
  ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
  Uname: Linux 4.13.0-12-generic x86_64
  ApportVersion: 2.20.7-0ubuntu2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct  6 23:18:01 2017
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2017-09-22 (14 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170917)
  IpRoute:
   default via 192.168.1.254 dev wlp3s0 proto static metric 600 
   169.254.0.0/16 dev wlp3s0 scope link metric 1000 
   192.168.1.0/24 dev wlp3s0 proto kernel scope link src 192.168.1.105 metric 
600
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-dev:
   DEVICE  TYPE      STATE        DBUS-PATH                                  
CONNECTION  CON-UUID                              CON-PATH                      
                     
   wlp3s0  wifi      connected    /org/freedesktop/NetworkManager/Devices/3  
Alice_BO    2f15ab74-48df-437b-b0a1-83bf31708fea  
/org/freedesktop/NetworkManager/ActiveConnection/1 
   enp2s0  ethernet  unavailable  /org/freedesktop/NetworkManager/Devices/2  -- 
         --                                    --                               
                  
   lo      loopback  unmanaged    /org/freedesktop/NetworkManager/Devices/1  -- 
         --                                    --
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN    
   running  1.8.4    connected  started  full          enabled     enabled  
enabled  enabled  enabled

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