Hi Cristopher,
i'm sorry but my laptop affected by the bug that i wrote at
https://bugs.launchpad.net/bugs/1475042
crashed about a month ago (i can't repair it, the video card/monitor is
ko). So that i can't perform any other test to help.
Excuse me if i haven't updated the bug.

Best Regards
Fulvio

2016-02-21 21:09 GMT+01:00 Christopher M. Penalver <
<email address hidden>>:

> 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
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1475042
>
> Title:
>   ubuntu 15.04 wireless network driver doesn't connect: always "trying
>   to connect" animation
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> 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:  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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>