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

[fulvio]

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'.

[Henrique de Moraes Holschuh (hmh)]

This bug is filled against the wrong package, "intel-microcode" is only related to CPU microcode, not to wireless card microcode, or drivers...

I do not know to which package this bug should be reassigned.

[penalvch (penalvch)]

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

[fulvio (fulvio999)]

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")
> ------------------------------...

[penalvch (penalvch)]

fulvio, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1475042/comments/4 regarding you no longer have the hardware. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.