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[Bug 1475042] [NEW] ubuntu 15.04 Netowrk-manager doesn't connect with wireless network

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Public bug reported:

I'm using Ubuntu 15.04. After upgrading from 14.10  the wireless connection doesn't work on my Notebook Acer Travelmate 5720G 
Network Manager scan and find successfully all the available  wireless networks on start-up, but when i try to connect with one of them, Network-manager ALWAYS display the "connecting..." animation and doesn't connect (i can't access to internet and not even to Access point admin page).Seem that it try to connect but can't do it, also waiting for a long time.

My access point (Digicom Michelangelo wave 150 C) uses wpa2 encryption and i haven't modified it, also my notebook hardware
configuration is not changed (i use the builtin wireless network card provided by my notebook: no external card).
Using Ubuntu 14.10 the wifi connection worked correctly. Also, using the same wireless access point, but with another notebook (Toshiba Tecra with Ubuntu 14.10) i have no problems, everything is ok.
Using the cable connection (eg: eth0 interface ) everything works.

Trying to disconnect and reconnect the wireless, delete and recreate the network, reinstall the network-manager and network-related packages the problem persist.
A strange thing is that the network manager shows the "connecting..." animation but opening the network-manager menu show the "Disconnect" menu entry (like when you are connected, but you are not connected).

No system crash or other problems are shown.

Here iwconfig output:
wlan0     IEEE 802.11abg  ESSID:off/any  
             Mode:Managed  Access Point: Not-Associated   Tx-Power=15 dBm   
             Retry short limit:7   RTS thr:off   Fragment thr:off
             Power Management:off

The uname -a output is:
Linux my-pc 3.19.0-22-generic #22-Ubuntu SMP Tue Jun 16 17:14:22 UTC 2015 i686 i686 i686 GNU/Linux


network-manager version installed is:  0.9.10.0-4ubuntu15.1

Before submitting the bug I have installed all the available updates at
15 july 2015 but the problem persist.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: network-manager 0.9.10.0-4ubuntu15.1
ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
Uname: Linux 3.19.0-22-generic i686
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: i386
CurrentDesktop: Unity
Date: Wed Jul 15 23:57:06 2015
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2013-05-26 (780 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
IpRoute:
 default via 192.168.1.254 dev eth0  proto static  metric 1024 
 169.254.0.0/16 dev eth0  scope link  metric 1000 
 192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.1
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to vivid on 2015-05-14 (62 days ago)
nmcli-con:
 NAME                    UUID                                  TYPE             TIMESTAMP   TIMESTAMP-REAL                 AUTOCONNECT  READONLY  DBUS-PATH                                   ACTIVE  DEVICE  STATE      ACTIVE-PATH                                        
 Connessione via cavo 1  f2f696e8-00df-4547-8669-feac4d6a4c66  802-3-ethernet   1436997193  mer 15 lug 2015 23:53:13 CEST  yes          no        /org/freedesktop/NetworkManager/Settings/1  yes     eth0    activated  /org/freedesktop/NetworkManager/ActiveConnection/3 
 horizon_net             dc7a0ebf-ecd9-4341-af77-45b587f8f93e  802-11-wireless  1436735226  dom 12 lug 2015 23:07:06 CEST  yes          no        /org/freedesktop/NetworkManager/Settings/0  no      --      --         --
nmcli-dev:
 DEVICE  TYPE      STATE         DBUS-PATH                                  CONNECTION              CON-UUID                              CON-PATH                                           
 eth0    ethernet  connected     /org/freedesktop/NetworkManager/Devices/1  Connessione via cavo 1  f2f696e8-00df-4547-8669-feac4d6a4c66  /org/freedesktop/NetworkManager/ActiveConnection/3 
 wlan0   wifi      disconnected  /org/freedesktop/NetworkManager/Devices/3  --                      --                                    --                                                 
 lo      loopback  unmanaged     /org/freedesktop/NetworkManager/Devices/0  --                      --                                    --                                                 
 irda0   unknown   unmanaged     /org/freedesktop/NetworkManager/Devices/2  --                      --                                    --
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: apport-bug i386 vivid

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1475042

Title:
  ubuntu 15.04 Netowrk-manager doesn't connect with wireless network

Status in network-manager package in Ubuntu:
  New

Bug description:
  I'm using Ubuntu 15.04. After upgrading from 14.10  the wireless connection doesn't work on my Notebook Acer Travelmate 5720G 
  Network Manager scan and find successfully all the available  wireless networks on start-up, but when i try to connect with one of them, Network-manager ALWAYS display the "connecting..." animation and doesn't connect (i can't access to internet and not even to Access point admin page).Seem that it try to connect but can't do it, also waiting for a long time.

  My access point (Digicom Michelangelo wave 150 C) uses wpa2 encryption and i haven't modified it, also my notebook hardware
  configuration is not changed (i use the builtin wireless network card provided by my notebook: no external card).
  Using Ubuntu 14.10 the wifi connection worked correctly. Also, using the same wireless access point, but with another notebook (Toshiba Tecra with Ubuntu 14.10) i have no problems, everything is ok.
  Using the cable connection (eg: eth0 interface ) everything works.

  Trying to disconnect and reconnect the wireless, delete and recreate the network, reinstall the network-manager and network-related packages the problem persist.
  A strange thing is that the network manager shows the "connecting..." animation but opening the network-manager menu show the "Disconnect" menu entry (like when you are connected, but you are not connected).

  No system crash or other problems are shown.

  Here iwconfig output:
  wlan0     IEEE 802.11abg  ESSID:off/any  
               Mode:Managed  Access Point: Not-Associated   Tx-Power=15 dBm   
               Retry short limit:7   RTS thr:off   Fragment thr:off
               Power Management:off

  The uname -a output is:
  Linux my-pc 3.19.0-22-generic #22-Ubuntu SMP Tue Jun 16 17:14:22 UTC 2015 i686 i686 i686 GNU/Linux

  
  network-manager version installed is:  0.9.10.0-4ubuntu15.1

  Before submitting the bug I have installed all the available updates
  at 15 july 2015 but the problem persist.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: network-manager 0.9.10.0-4ubuntu15.1
  ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
  Uname: Linux 3.19.0-22-generic i686
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: i386
  CurrentDesktop: Unity
  Date: Wed Jul 15 23:57:06 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2013-05-26 (780 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
  IpRoute:
   default via 192.168.1.254 dev eth0  proto static  metric 1024 
   169.254.0.0/16 dev eth0  scope link  metric 1000 
   192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.1
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to vivid on 2015-05-14 (62 days ago)
  nmcli-con:
   NAME                    UUID                                  TYPE             TIMESTAMP   TIMESTAMP-REAL                 AUTOCONNECT  READONLY  DBUS-PATH                                   ACTIVE  DEVICE  STATE      ACTIVE-PATH                                        
   Connessione via cavo 1  f2f696e8-00df-4547-8669-feac4d6a4c66  802-3-ethernet   1436997193  mer 15 lug 2015 23:53:13 CEST  yes          no        /org/freedesktop/NetworkManager/Settings/1  yes     eth0    activated  /org/freedesktop/NetworkManager/ActiveConnection/3 
   horizon_net             dc7a0ebf-ecd9-4341-af77-45b587f8f93e  802-11-wireless  1436735226  dom 12 lug 2015 23:07:06 CEST  yes          no        /org/freedesktop/NetworkManager/Settings/0  no      --      --         --
  nmcli-dev:
   DEVICE  TYPE      STATE         DBUS-PATH                                  CONNECTION              CON-UUID                              CON-PATH                                           
   eth0    ethernet  connected     /org/freedesktop/NetworkManager/Devices/1  Connessione via cavo 1  f2f696e8-00df-4547-8669-feac4d6a4c66  /org/freedesktop/NetworkManager/ActiveConnection/3 
   wlan0   wifi      disconnected  /org/freedesktop/NetworkManager/Devices/3  --                      --                                    --                                                 
   lo      loopback  unmanaged     /org/freedesktop/NetworkManager/Devices/0  --                      --                                    --                                                 
   irda0   unknown   unmanaged     /org/freedesktop/NetworkManager/Devices/2  --                      --                                    --
  nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

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