This bug is insane. I tried to make some sense of all the comments, and there are *at least* three unrelated problems ...
Problem #1: "my skype connection is randomly interrupted and using wicd fixes it" This is likely caused by background scanning not going as smoothly as you think -- I believe most versions of NetworkManager still scan every 2 minutes, but there were improvements in this area. Problem #2: "my router crashes when I use Intel's card" (see comment #24, comment #34) This is a bug we've investigated and we think we fixed it in commit 59f53ce22e, upgrading the kernel to 3.0.0-13.21 (ubuntu version) or 3.0.6 (stable version) should fix it. I'd love to see this tested again, but it seems unlikely that there are two bugs that both cause some APs to crash (I'd HOPE not, but some APs are notoriously shoddy quality...) Problem #3: "my 11n connection is really slow, disabling 11n helps" This is puzzling, and since I've never seen this anywhere I'm starting to think it might be a combination of the router/AP & environment used. Anyone near Portland, OR or Bielefeld (Germany) where we could debug in person? :-) Problem #4: "my connections are dropped frequently" This might or might not be related to #3, but I can't really tell. Generally, it would be nice if the commenters would include more details about their setup, like the exact kernel version (ubuntu package version number), and, if possible at all, the model of the AP. Thx! I'll continue monitoring this bug report for a while but with the volume of reports I'll have to devise a debug strategy first ... -- 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: Invalid Status in “linux” source package in Oneiric: Triaged Status in “network-manager” source package in Oneiric: Invalid Status in “linux” source package in Precise: Triaged Status in “network-manager” source package in Precise: Invalid 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 : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
