rkrizan, thank you for reporting this and helping make Ubuntu better. Could you
please boot into a Ubuntu repo kernel, and execute the following at a terminal:
apport-collect 874777
Joesph Salisbury, I'll remark duplicate of bug 836250 after apport-
collect and OR found to be using iwlagn.
** This bug is no longer a duplicate of bug 836250
8086:4238 [Oneiric] [Regression] Intel Corporation Centrino Ultimate-N 6300
poor networking, packet loss and very slow Lenovo X201 and T500 laptops
** Description changed:
While upgrading 2 separate laptops from Ubuntu 11.04 to 11.10, one being
a Dell E1505 with an Intel 4965 card, the other being a Dell 1545 with a
WiFi Link 5100 card, both suffer from nearly null wireless speeds. Both
computers will connect to the network just fine, however, wireless
speeds are terrible. Connecting directly to router via Cat5E cable and
disabling wireless results in normal speeds.
- Both machines had kernels upgraded to latest mainstream kernels, and problem
persisted. I had to revert both machines back to 11.04.
- ---
+ Both machines had kernels upgraded to latest mainstream kernels, and
+ problem persisted. I had to revert both machines back to 11.04.
+
+ WORKAROUND:
+ sudo rmmod -s iwlagn (or iwl4965)
+ sudo modprobe iwlagn (or iwl4965) 11n_disable=1
+
+ ---
Architecture: amd64
DistroRelease: Ubuntu 11.04
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
Package: linux (not installed)
ProcEnviron:
- LANGUAGE=en_US:en
- LANG=en_US.UTF-8
- SHELL=/bin/bash
+ LANGUAGE=en_US:en
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
Tags: natty
Uname: Linux 3.0.6-030006-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: Upgraded to natty on 2011-09-02 (43 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers
- ---
+ ---
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
DistroRelease: Ubuntu 11.10
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
Package: linux (not installed)
ProcEnviron:
- PATH=(custom, no user)
- LANG=en_US.UTF-8
- SHELL=/bin/bash
+ PATH=(custom, no user)
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
Tags: oneiric
Uname: Linux 3.0.6-030006-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Triaged => Incomplete
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https://bugs.launchpad.net/bugs/874777
Title:
Intel WiFi Cards with slow connection speeds
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