Here's the problem with using previous kernels. I tried several things immediately after installing 11.10. I tried the latest upstream kernel, 3.0.6 (at the time), and I also tried the latest developmental build with 3.1-RC9, both kernels had the same issue. However, both kernels did NOT have this issue when used under 11.04. In other words, laptop using 3.0.6 with 11.04, no issue. Same laptop with 11.10 with 3.0.6, had an issue.
So, that being said, after installing 11.10, I installed the latest proven-working NATTY kernel (I believe it was 2.6.38-8) and the issue was still there. 11.04 with 3.0.6 = OK 11.04 with 3.1-RC9 = OK 11.04 with 2.6.38.8 = OK However; 11.10 with 3.0.6 = BAD 11.10 with 3.1-RC9 = BAD 11.10 with 2.6.38-8 = BAD UNLESS 11n_disable=1, then all is good. I'm starting to think this is more a driver issue, than a kernel issue. I realize that 3.0.7 has been released, but I haven't tested that kernel yet. -- 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] Intel Corporation Centrino Ultimate-N 6300 poor networking, packet loss and very slow Lenovo X201 and T500 laptops Status in “linux” package in Ubuntu: Confirmed Status in “network-manager” package in Ubuntu: Confirmed Status in “linux” source package in Oneiric: Confirmed Status in “network-manager” source package in Oneiric: Confirmed Status in “linux” source package in Precise: Confirmed 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/ubuntu/+source/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
