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[Launchpad Bug Tracker <1323710@xxxxxxxxxxxxxxxxxx>]

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I'm not sure if this is a network-manager problem or a pm problem.

Since updating to trusty my laptop - Lenovo T510 - wakes from suspend
without wifi. Initially there the nm gui control showed no networks and
disonnected state. Ifconfig showed only the loopback. Wetting wlan0 to
up brought it back but nm wouldn't connect.

I created an unload_module entry and added:

SUSPEND_MODULES="$SUSPEND_MODULES iwlwifi"

to:

/etc/pm/config.d/unload_modules


After that the nm gui showed networks and tried to connect to the correct one but was unsuccessful.

I created /etc/pm/sleep.d/network-manager-resume

#!/bin/sh

case "${1}" in
        resume|thaw)
        nmcli nm sleep false
                ;;
esac

but this hasn't helped.

I tried connecting directly using nmcli dev and got the error message:

Error: Connection activation failed: (53) The Wi-Fi network could not be
found.

Rebooting after waking restores networking.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager 0.9.8.8-0ubuntu7
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue May 27 07:51:10 2014
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2013-11-19 (188 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
IpRoute:
 default via 192.168.0.1 dev wlan0  proto static 
 192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.101  metric 9
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to trusty on 2014-05-01 (25 days ago)
nmcli-con:
 NAME                      UUID                                   TYPE              TIMESTAMP    TIMESTAMP-REAL                     AUTOCONNECT   READONLY   DBUS-PATH                                 
 martin-5.0                b4ef8c22-9ae1-4058-8bfc-c6442634467c   802-11-wireless   1401202160   Tue 27 May 2014 07:49:20 AM PDT    yes           no         /org/freedesktop/NetworkManager/Settings/2
 Cisco03329                a94faf57-01c2-44ef-a474-1acb3523c839   802-11-wireless   1385160323   Fri 22 Nov 2013 02:45:23 PM PST    yes           no         /org/freedesktop/NetworkManager/Settings/1
 martin-5.0 1              d662b0e5-a70d-4010-b3f8-846b6166a22a   802-11-wireless   0            never                              yes           no         /org/freedesktop/NetworkManager/Settings/0
 Wired connection 1        05195919-bf9a-49c1-9991-64ce5d41c081   802-3-ethernet    1401198260   Tue 27 May 2014 06:44:20 AM PDT    yes           no         /org/freedesktop/NetworkManager/Settings/3
nmcli-dev:
 DEVICE     TYPE              STATE         DBUS-PATH                                  
 wlan0      802-11-wireless   connected     /org/freedesktop/NetworkManager/Devices/1  
 eth0       802-3-ethernet    unavailable   /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING         VERSION    STATE           NET-ENABLED   WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
 running         0.9.8.8    connected       enabled       enabled         enabled    enabled         disabled

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug trusty
-- 
After wake from suspend network-manager can't find wifi network 
https://bugs.launchpad.net/bugs/1323710
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