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[Bug 1374863] [NEW] wifi becomes unstable upgrading from ubuntu 12.04 to ubuntu 14.04

 

Public bug reported:

wifi becomes unstable upgrading from ubuntu 12.04 to ubuntu 14.04 for
many users using intel wifi card (as described in thid thread:
http://forum.ubuntu-it.org/viewtopic.php?p=4587552), maybe a
driver/kernel issue.

slved via:
sudo modprobe -rv iwl3945
sudo modprobe -v iwl3945 swcrypto=1
cat /etc/hosts
sudo rmmod iwl3945
sudo modprobe iwl3945

Intel signaled a previous problem of compatibility between driver and
some kernels.

I updated recently from ubuntu 12.04 to xubuntu 14.04.  the problem
didn't existed when I updated via 'update-manager -d', but appeared when
I reinstalled new xubuntu from live dvd.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager 0.9.8.8-0ubuntu7 [modified: usr/bin/nm-online usr/bin/nm-tool usr/bin/nmcli usr/lib/NetworkManager/nm-avahi-autoipd.action usr/lib/NetworkManager/nm-dhcp-client.action usr/lib/NetworkManager/nm-dispatcher.action usr/sbin/NetworkManager]
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Sep 27 23:47:32 2014
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2014-09-12 (15 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140310)
IpRoute:
 default via 192.168.1.254 dev wlan0  proto static 
 192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.128  metric 9
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME                      UUID                                   TYPE              TIMESTAMP    TIMESTAMP-REAL                     AUTOCONNECT   READONLY   DBUS-PATH                                 
 Connessione via cavo 1    b4fb3004-8943-4f93-818b-eaa081e97aa6   802-3-ethernet    1411820971   sab 27 set 2014 14:29:31 CEST      yes           no         /org/freedesktop/NetworkManager/Settings/1
 FASTWEB-1-zMohBACjWHjt    fad5a9fd-124b-49d1-a0e1-11f0f0b17f67   802-11-wireless   1411854271   sab 27 set 2014 23:44:31 CEST      yes           no         /org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
 DEVICE     TYPE              STATE         DBUS-PATH                                  
 eth0       802-3-ethernet    unavailable   /org/freedesktop/NetworkManager/Devices/1  
 wlan0      802-11-wireless   connected     /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: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

-- 
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https://bugs.launchpad.net/bugs/1374863

Title:
  wifi becomes unstable upgrading from ubuntu 12.04 to ubuntu 14.04

Status in “network-manager” package in Ubuntu:
  New

Bug description:
  wifi becomes unstable upgrading from ubuntu 12.04 to ubuntu 14.04 for
  many users using intel wifi card (as described in thid thread:
  http://forum.ubuntu-it.org/viewtopic.php?p=4587552), maybe a
  driver/kernel issue.

  slved via:
  sudo modprobe -rv iwl3945
  sudo modprobe -v iwl3945 swcrypto=1
  cat /etc/hosts
  sudo rmmod iwl3945
  sudo modprobe iwl3945

  Intel signaled a previous problem of compatibility between driver and
  some kernels.

  I updated recently from ubuntu 12.04 to xubuntu 14.04.  the problem
  didn't existed when I updated via 'update-manager -d', but appeared
  when I reinstalled new xubuntu from live dvd.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: network-manager 0.9.8.8-0ubuntu7 [modified: usr/bin/nm-online usr/bin/nm-tool usr/bin/nmcli usr/lib/NetworkManager/nm-avahi-autoipd.action usr/lib/NetworkManager/nm-dhcp-client.action usr/lib/NetworkManager/nm-dispatcher.action usr/sbin/NetworkManager]
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sat Sep 27 23:47:32 2014
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2014-09-12 (15 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140310)
  IpRoute:
   default via 192.168.1.254 dev wlan0  proto static 
   192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.128  metric 9
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-con:
   NAME                      UUID                                   TYPE              TIMESTAMP    TIMESTAMP-REAL                     AUTOCONNECT   READONLY   DBUS-PATH                                 
   Connessione via cavo 1    b4fb3004-8943-4f93-818b-eaa081e97aa6   802-3-ethernet    1411820971   sab 27 set 2014 14:29:31 CEST      yes           no         /org/freedesktop/NetworkManager/Settings/1
   FASTWEB-1-zMohBACjWHjt    fad5a9fd-124b-49d1-a0e1-11f0f0b17f67   802-11-wireless   1411854271   sab 27 set 2014 23:44:31 CEST      yes           no         /org/freedesktop/NetworkManager/Settings/0
  nmcli-dev:
   DEVICE     TYPE              STATE         DBUS-PATH                                  
   eth0       802-3-ethernet    unavailable   /org/freedesktop/NetworkManager/Devices/1  
   wlan0      802-11-wireless   connected     /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

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