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Message #37505
[Bug 836250] Re: [Oneiric] Intel Corporation Centrino Ultimate-N 6300 poor networking, packet loss and very slow Lenovo X201 and T500 laptops
@Joseph Salisbury
I just booted in to my previous kerne againl, and wireless did in fact work.
It looks like my previous assertion was wrong, or that this bug only manifests
itself in the previous kernel when connecting to certain routers (I am at work now).
Sorry for the confusion!
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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)
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References