System freeze on switching to wireless network

[Péter Sümegi]

Description: Ubuntu 15.04
Release: 15.04

This is a HP ProBook 6570b notebook.
It freezes after logging in when connecting to WLAN.
Occurs only when static IP configured.
Doesn't occur when network-manager disabled (/etc/network/interfaces used)

Reproduce:

1. Configure WLAN static IP, DNS
2. Reboot
3. After login, (after the "you are connected to aa wifi network" message disappears) the system freeze

Another case:

1. Login with WLAN disabled by hardware switch
2. Connect to ethernet network
3. Configure WLAN static IP, DNS
4. Turn on WLAN and connect to a network
5. Now the system wont freeze as the primary network connection is the ethernet
6. Unplug the ethernet cable
7. Some seconds later the system freeze

Workaround:

Turn off WLAN before login

or

Turn off WLAN before unplug cable
Then turn it on

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: network-manager 0.9.10.0-4ubuntu15.1
ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
Uname: Linux 3.19.0-18-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jun 12 19:22:20 2015
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2015-05-07 (36 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
IpRoute:
 default via 192.168.180.20 dev eth0 proto static metric 1024
 169.254.0.0/16 dev eth0 scope link metric 1000
 192.168.123.0/24 dev wlan0 proto kernel scope link src 192.168.123.67
 192.168.180.0/24 dev eth0 proto kernel scope link src 192.168.180.205
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 eth0 ethernet connected /org/freedesktop/NetworkManager/Devices/1 Wired connection 1 eb3175ee-4070-4a74-bfe9-407216bfa6e1 /org/freedesktop/NetworkManager/ActiveConnection/0
 wlan0 wifi connected /org/freedesktop/NetworkManager/Devices/2 DSL-Kecskemet 259040d7-dcfb-417d-aeaf-e6f6d378c3ea /org/freedesktop/NetworkManager/ActiveConnection/2
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Matthew Moppett (matthewmoppett)]

I assume I'm seeing the same bug, except on Xubuntu 15.04. If I configure a static IP for a connection to a wifi network using nm-applet, the system freezes a few seconds later, requiring a hard reboot. After rebooting, if the computer attempts to to connect to the same network, it will freeze again unless I quickly disable networking via nm-applet. Connecting using DHCP does not cause this problem.

[Yusuf Güngör (yusuf2)]

This bug affects me too. Is there any solution?