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[Bug 1475042] Re: ubuntu 15.04 wireless network driver doesn't connect: always "trying to connect" animation


fulvio, thank you for reporting this bug to Ubuntu. Vivid reached EOL on February 4, 2016.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

If this is still an issue, could you please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1475042

** No longer affects: intel-microcode (Ubuntu)

** Package changed: network-manager (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

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

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  ubuntu 15.04 wireless network driver doesn't connect: always "trying
  to connect" animation

Status in linux package in Ubuntu:

Bug description:
  I'm using Ubuntu 15.04 after the network upgrade from 14.10.
  The wireless connection doesn't work on my Notebook Acer Travelmate 5720G

  The cable connection (eg: eth0 interface ) works.

  With Ubuntu 14.10 the wifi connection was ok.

  Network Manager 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..." animated icon and doesn't connect (i can't access to internet and not even to my Access point admin page).
  Opening the network-manager menu show the "Disconnect" menu entry (like when you are connected, but you are not connected).

  My access point (Digicom Michelangelo wave 150 C) uses wpa2 encryption.
  I haven't done no harware modifications (i use the same builtin wireless network card provided by my notebook).

  Using the same wireless access point with another notebook (Toshiba
  Tecra with Ubuntu 14.10) everything is ok.

  I have tryed to disconnect/reconnect the wireless, reinstall the
  network-manager.. but with no results.

  ------ Imortant: -------------------
  I have discovered that the "Additional Driver tool" allow to enable/disable an additional driver named "Processor microcode firmware for intel CPU (proprietary)".

  I have done a test running a fresh ubuntu 15.04 live cd: i can't
  connect to wireless, but enabling the above Intel driver i can connect

  Repeating the same test with the installed ubuntu 15.04 i was able to
  connect only a couple of times (i have tryed to enable/disable the
  driver after a kernel update from the Ubuntu update manager, but with
  no result).

  Disabling the Intel driver happen the same situation described above (ie: always "trying to connect")

  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:

  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
  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
   # 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)
   default via dev eth0  proto static  metric 1024 dev eth0  scope link  metric 1000 dev eth0  proto kernel  scope link  src
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to vivid on 2015-05-14 (62 days ago)
   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      --      --         --
   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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