Wireless performance issues on kernel 3.4.0-1-generic (iwlwifi)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Incomplete
|
Medium
|
Unassigned |
Bug Description
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]
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-
ProcVersionSign
Uname: Linux 3.4.0-1-generic x86_64
NonfreeKernelMo
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/
/dev/snd/
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf6a00000 irq 49'
Mixer name : 'Realtek ALC269VB'
Components : 'HDA:10ec0269,
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,
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=
RelatedPackageV
linux-
linux-
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.
dmi.board.name: G74Sx
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: G74Sx
dmi.product.
dmi.sys.vendor: ASUSTeK Computer Inc.
summary: |
- Wireless performance issues on kernel 3.4.0-1-generic + Wireless performance issues on kernel 3.4.0-1-generic (iwlwifi) |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
tags: |
added: kernel-da-key removed: kernel-key |
Changed in linux: | |
importance: | Unknown → Medium |
status: | Unknown → In Progress |
Can't I set affected package to linux-image- 3.4.0-1- generic, It gets set to linux automatically with a message - 'linux- image-3. 4.0-1-generic' is a binary package. This bug has been assigned to its source package 'linux' instead.