Public bug reported:

If I boot my phone at home, it happily connects to my wireless network.
If I leave home and have Cellular Data enabled, it will establish a 3G
connection. If I then return home, it remains on 3G instead of switching
back to the wireless network. Even if I disable Cellular data, the
wireless connection is not re-established.

I have tried restarting network-manager and wpasupplicant, to no avail.
The only way I have been able to get it to reconnect to the wireless
network is to reboot the phone.  The logs suggest that the wireless
authentication fails, but the reboot doesn't prompt for new credentials.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager 0.9.8.4-0ubuntu3
Uname: Linux 3.4.0-3-mako armv7l
ApportVersion: 2.12.6-0ubuntu1
Architecture: armhf
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Sun Nov 17 17:19:14 2013
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 # Include files from /etc/network/interfaces.d:
 source-directory /etc/network/interfaces.d
InstallationDate: Installed on 2013-11-15 (2 days ago)
InstallationMedia: Ubuntu Trusty Tahr (development branch) - armhf (20131115)
IpRoute:
 default via 217.169.7.97 dev wlan0  proto static 
 217.169.7.96/27 dev wlan0  proto kernel  scope link  src 217.169.7.115  metric 
9
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
PciNetwork:
 
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.dbus.1.system.d.org.freedesktop.NetworkManager.conf: 
2013-11-11T17:26:39
nmcli-con:
 NAME                      UUID                                   TYPE          
    TIMESTAMP    TIMESTAMP-REAL                     AUTOCONNECT   READONLY   
DBUS-PATH                                 
 wyrddreams                83361e0b-c649-40bb-a06b-b9dfdf8e9b88   
802-11-wireless   1384708569   Sun 17 Nov 2013 05:16:09 PM GMT    yes           
no         /org/freedesktop/NetworkManager/Settings/2
 robsnetwork1a             35fd68ec-6692-4257-a1fb-2b1a5d6f5c0b   
802-11-wireless   1384635695   Sat 16 Nov 2013 09:01:35 PM GMT    yes           
no         /org/freedesktop/NetworkManager/Settings/1
 /234304102840004/context1 f7e681eb-f938-6eb7-7d28-0ccde53ac6ff   gsm           
    1384653566   Sun 17 Nov 2013 01:59:26 AM GMT    yes           yes        
/org/freedesktop/NetworkManager/Settings/0
 the mickleover            84355cc1-a50d-44d6-b761-873d4cde3e56   
802-11-wireless   0            never                              yes           
no         /org/freedesktop/NetworkManager/Settings/3
nmcli-dev:
 DEVICE     TYPE              STATE         DBUS-PATH                           
       
 /ril_0     gsm               disconnected  
/org/freedesktop/NetworkManager/Devices/1  
 wlan0      802-11-wireless   connected     
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING         VERSION    STATE           NET-ENABLED   WIFI-HARDWARE   WIFI  
     WWAN-HARDWARE   WWAN      
 running         0.9.8.4    connected       enabled       enabled         
enabled    enabled         disabled

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


** Tags: apport-bug armhf trusty

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https://bugs.launchpad.net/bugs/1252106

Title:
  WiFi connections not re-established

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