desktop-packages team mailing list archive

[Mathieu Trudel-Lapierre <mathieu.tl@xxxxxxxxx>]

I think I know what this is, but it's a little tricky to test/prove.
With both wired and wireless connected, could you do the following:

1) Capture the output of two separate commands (in separate terminals)
running roughly at the same time:

sudo tcpdump -i eth0 icmp or arp
sudo tcpdump -i wlan0 icmp or arp

2) As these are running, start in a third terminal: "ping 8.8.8.8"

They don't need to be started exactly at the same time; and we only need
the terminal output because they can include sensitive data if run while
other things are going on using the network. This should only need to
run for a short while: in ping, you'll likely see no responses for a
while and short bursts of actually getting responses, or the other way
around. If you always get responses or never get any, then it's
something different (but the output of tcpdump will still help).

And the highly technical explanation for all this:
I think traffic is being routed incorrectly; as if for a while eth0 sends the traffic, and it comes back through wlan0 (which would cause it to be "lost"). At some point once other network devices have their arp cache expire; depending on how fast arp replies will get to the server; eth0 will start to both send and receive traffic and connections will complete. Then another arp request will come by and break it again.

However, I don't see how this would be tied to an update unless there
was a kernel change very recently. Wired is not affected by many things
except NM to establish connections and the driver/kernel to push data.
The latest upload of NM doesn't appear to be installed on your system
yet (I uploaded it just a few hours ago). The last kernel upload was 9
days ago. I'm not sure what else may have affected the device.

** Changed in: network-manager (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/856333

Title:
  (oneiric) wired connection unnaturally slow

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

Bug description:
  After an update today (22 Sept) my wired connection is so slow as to
  be unworkable.  I have a Thinkpad X201s, so this could be a dupe of
  bug #836250, but that bug was reported a month ago and my machine has
  worked fine much more recently than that.  I feel this is something
  that was introduced in an update sometime in the last 2-3 days.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: network-manager 0.9.0-0ubuntu3
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  CRDA: Error: [Errno 2] No such file or directory
  Date: Thu Sep 22 12:46:39 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IpRoute:
   default via 10.45.43.1 dev eth0  proto static 
   10.45.43.0/24 dev eth0  proto kernel  scope link  src 10.45.43.13 
   10.45.43.0/24 dev wlan0  proto kernel  scope link  src 10.45.43.94 
   169.254.0.0/16 dev eth0  scope link  metric 1000
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to oneiric on 2011-09-07 (14 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/856333/+subscriptions