Public bug reported:
I was expecting this to happen but was too lazy on reporting issues on
mainline kernels earlier. But now since the 3.4 kernels has made it to
quantal repos, I am affected by it.
The issue is that on 3.4 kernels (I have tried all mainline kernels RC1
to RC5), my wireless performance goes for toss.
I am attaching a screenshot as well on current wireless signal. At same
location on my previous precise kernel ( 3.2.0.24) the connection speed
is around 52 mpbs (average), but on this kernel the connection is very
unstable. As I connect (or when system starts up), the connection speed
is like 40mbps, and this degrades in a minute or so to 19 mbps, then to
6 mbps and eventually connection becomes crazily slow on 1 mbps.
This is reproducible every time.
Hopefully, apport has collected enough information but I will try to
provide some more info as part of description.
$ lspci -v
03:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150
(rev 67)
Subsystem: Intel Corporation Centrino Wireless-N + WiMAX 6150 BGN
Flags: bus master, fast devsel, latency 0, IRQ 48
Memory at f5600000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Let me know what information I can provide to get help resolve this
blocking issue, which wont let me try/test kernel 3.4 further.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.4.0-1-generic 3.4.0-1.3
ProcVersionSignature: Ubuntu 3.4.0-1.3-generic 3.4.0-rc5
Uname: Linux 3.4.0-1-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: kx 2169 F.... pulseaudio
/dev/snd/controlC0: kx 2169 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf6a00000 irq 49'
Mixer name : 'Realtek ALC269VB'
Components : 'HDA:10ec0269,10431b33,00100100'
Controls : 24
Simple ctrls : 13
Card1.Amixer.info:
Card hw:1 'NVidia'/'HDA NVidia at 0xf4080000 irq 17'
Mixer name : 'Nvidia GPU 15 HDMI/DP'
Components : 'HDA:10de0015,10de0101,00100100'
Controls : 24
Simple ctrls : 4
Date: Thu May 3 22:20:25 2012
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
MachineType: ASUSTeK Computer Inc. G74Sx
ProcEnviron:
LANGUAGE=en_IN
TERM=xterm
PATH=(custom, user)
LANG=en_IN.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.4.0-1-generic
root=UUID=ad1c5163-5aee-4c62-8395-af61ae2995a7 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.4.0-1-generic N/A
linux-backports-modules-3.4.0-1-generic N/A
linux-firmware 1.80
SourcePackage: linux
StagingDrivers: rts5139 mei
UpgradeStatus: Upgraded to quantal on 2011-11-17 (167 days ago)
dmi.bios.date: 09/23/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: G74Sx.203
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: G74Sx
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrG74Sx.203:bd09/23/2011:svnASUSTeKComputerInc.:pnG74Sx:pvr1.0:rvnASUSTeKComputerInc.:rnG74Sx:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: G74Sx
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug quantal staging third-party-packages
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https://bugs.launchpad.net/bugs/994104
Title:
Wireless performance issues on kernel 3.4.0-1-generic
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