Ubuntu
network-manager package

Two network adapters on same LAN causes 30s drop-outs

Bug #1441053 reported by Alan Pope 🍺🐧🐱 🦄 on 2015-04-07

This bug report is a duplicate of: Bug #1436330: Network Manager doesn't set metric for local networks any more, causing connection issues. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	network-manager (Ubuntu)	New	Undecided	Unassigned

Bug Description

Thinkpad X220 in a docking station.
Wired ethernet connection on docking station enabled and connected & working.
Wifi adapter in laptop is enabled and connected to same network.

In 14.10 I could have both enabled, and plug/unplug laptop to docking station and everything "Just Works"

Since 15.04 I can't have both network devices enabled because the network is unusable until I disable one of the devices.

Steps to reproduce:-

Connect laptop to wired and wifi
Reboot.
Login to desktop
Start pinging a remote host, e.g. 8.8.8.8.
Observe long (30s) drop-outs, then around 7-10 seconds of functional internet connection, then 30 seconds off again.

http://paste.ubuntu.com/10759863/

Note: no response between lines 2 and 3, 10 and 11, 18 and 19, 26 and 27 etc. Just before line 43 I disconnected from the wifi using the network manager applet -> Disconnect menu item.

The system functions perfectly normally once wifi is disconnected.

Similarly I can disable wired connection and the system works fine.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: network-manager 0.9.10.0-4ubuntu13
ProcVersionSignature: Ubuntu 3.19.0-12.12-generic 3.19.3
Uname: Linux 3.19.0-12-generic x86_64
ApportVersion: 2.17-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Apr 7 10:10:42 2015
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2014-06-16 (294 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IpRoute:
default via 192.168.1.1 dev eth0 proto static metric 1024
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.90
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
SourcePackage: network-manager
UpgradeStatus: Upgraded to vivid on 2015-02-05 (60 days ago)
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2014-09-25T11:02:51.660372
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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Revision history for this message

Alan Pope 🍺🐧🐱 🦄 (popey) wrote on 2015-04-07:

CRDA.txt Edit (238 bytes, text/plain; charset="utf-8")
Dependencies.txt Edit (8.8 KiB, text/plain; charset="utf-8")
IpAddr.txt Edit (1.3 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (323 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (53.3 KiB, text/plain; charset="utf-8")
NetDevice.eth0.txt Edit (854 bytes, text/plain; charset="utf-8")
NetDevice.lo.txt Edit (247 bytes, text/plain; charset="utf-8")
NetDevice.virbr0.txt Edit (407 bytes, text/plain; charset="utf-8")
NetDevice.virbr0-nic.txt Edit (406 bytes, text/plain; charset="utf-8")
NetDevice.wlan0.txt Edit (922 bytes, text/plain; charset="utf-8")
NetworkManager.conf.txt Edit (111 bytes, text/plain; charset="utf-8")
NetworkManager.state.txt Edit (102 bytes, text/plain; charset="utf-8")
PciNetwork.txt Edit (1.2 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (115 bytes, text/plain; charset="utf-8")
RfKill.txt Edit (182 bytes, text/plain; charset="utf-8")
WifiSyslog.txt Edit (128.2 KiB, text/plain; charset="utf-8")
modified.conffile..etc.NetworkManager.NetworkManager.conf.txt Edit (112 bytes, text/plain; charset="utf-8")
nmcli-con.txt Edit (5.0 KiB, text/plain; charset="utf-8")
nmcli-dev.txt Edit (1.1 KiB, text/plain; charset="utf-8")