Public bug reported:

UBUNTU VERSION: Ubuntu desktop 16.04 64bit, system is up to date to
latest

KERNEL: Linux RooTBooK 4.4.0-22-generic #40-Ubuntu SMP Thu May 12
22:03:46 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

DHCPDISCOVER keeps looping on intervals until i restart network-manager, the 
loops are not happening
at every boot, but only sometimes at boot

WIFI CHIPSET: product: BCM4313 802.11bgn Wireless Network Adapter
WIFI DRIVER: driver=wl0 driverversion=6.30.223.248 (r487574) ip=192.168.1.3

the problem gets solved on network-manager restart and can be
reproduced.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.1.93-0ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Wed May 18 12:37:55 2016
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2016-04-25 (22 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IpRoute:
 default via 192.168.1.1 dev wlp7s0  proto static  metric 600 
 169.254.0.0/16 dev wlp7s0  scope link  metric 1000 
 192.168.1.0/24 dev wlp7s0  proto kernel  scope link  src 192.168.1.3  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                      
                     
 wlp7s0  wifi      connected    /org/freedesktop/NetworkManager/Devices/1  
belkin7 1   1042ceaf-e9a0-4db1-96dd-897213b0c61c  
/org/freedesktop/NetworkManager/ActiveConnection/0 
 enp6s0  ethernet  unavailable  /org/freedesktop/NetworkManager/Devices/2  --   
       --                                    --                                 
                
 lo      loopback  unmanaged    /org/freedesktop/NetworkManager/Devices/0  --   
       --                                    --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: 
Error: Object 'nm' is unknown, try 'nmcli help'.

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Attachment added: "tail of syslog before and after network-manager restart"
   https://bugs.launchpad.net/bugs/1583114/+attachment/4665353/+files/syslog

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https://bugs.launchpad.net/bugs/1583114

Title:
  Dhcpdiscover loops on interval until network-manager restart

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