Dave Russell did some testing on his X201 with various kernel versions and userspace tools. I'm attaching the results of this as a PDF.
>From these results we see the following: 1) Works on Natty 2.6.38 (though a bit slower than expected) 2) Oneiric/Precise 3.0.0/3.2.0 do not work (very slow to no connection) 3) Natty with an Oneiric Network Manager (0.8.4) works. 4) Oneiric with Wicd works. 5) Oneiric with N disabled works. So this looks to be related to network manager or could be a kernel<->userspace interaction. ** Attachment added: "LP836250 Test Matrix Dave X201.pdf" https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/836250/+attachment/2631777/+files/LP836250%20Test%20Matrix%20Dave%20X201.pdf -- 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/836250 Title: [Oneiric] [Regression] Intel Corporation Centrino Ultimate-N 6300 poor networking, packet loss and very slow Lenovo X201 and T500 laptops Status in The Linux Kernel: In Progress Status in “linux” package in Ubuntu: Triaged Status in “network-manager” package in Ubuntu: Confirmed Status in “linux” source package in Oneiric: Triaged Status in “network-manager” source package in Oneiric: Confirmed Status in “linux” source package in Precise: Triaged Status in “network-manager” source package in Precise: Confirmed Bug description: This may be either network-manager or kernel, depending on triage... I have verified this on both a Lenovo X201 and a Lenovo T500 laptop. Both work perfectly with fully updated 10.10 and 11.04 versions of Ubuntu. However, booting into a fully updated 11.10 (as of 28/08/11) I get very poor wireless networking performance. Between 6-10% packet loss, very very slow connection and transfer rate. All in all, practically unusable. I have reported the bug on the X201 laptop, I will add the similar logs from the T500 also if required. As soon as I swap back to either 10.10 or 11.04 I get perfect wireless, it's only on 11.10 that I get problems, this would suggest it's not hardware or configuration on my side. I have had this since first installing 11.10 which was a little after Alpha 2. Wired connection is fine. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: network-manager 0.9.0-0ubuntu1 ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3 Uname: Linux 3.0.0-9-generic x86_64 Architecture: amd64 CRDA: Error: [Errno 2] No such file or directory Date: Sun Aug 28 21:26:05 2011 EcryptfsInUse: Yes Gconf: IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1) IpRoute: default via 192.168.100.1 dev eth0 proto static 192.168.100.0/24 dev eth0 proto kernel scope link src 192.168.100.41 Keyfiles: Error: [Errno 2] No such file or directory NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/836250/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
