Intel 4965AGN Can't Do 5Ghz, 40Mhz in Maverick

[Nicholaus Shupe]

I upgraded my laptop from 10.04 to 10.10, and I can no longer connect to my 5Ghz/40Mhz-wide wireless N network. Here's a summary what works and doesn't work:

* Any random Wireless G network with 10.10 or Windows 7: Works!
* Home 5Ghz/40Mhz-wide network with Windows 7: Works!
* Home 5Ghz/40Mhz-wide network with 10.10: Fails

I'm going to try experimenting later with changing to 20Mhz-wide and then back down to 2.4Ghz to see if that causes it to work, however I do not see these steps as acceptable workarounds because on a 5Ghz/40Mhz-wide network, I can get 10MB/s over the air quite easily in the relatively uncongested 5Ghz spectrum.

Other info not collected: wireless router is a DGL-4500 with 1.22 firmware.

Thanks for taking a look at this bug.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.33
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nicholaus 1672 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfebf8000 irq 48'
   Mixer name : 'Realtek ALC660-VD'
   Components : 'HDA:10ec0660,10431339,00100001 HDA:10573055,10431316,00100700'
   Controls : 18
   Simple ctrls : 12
Date: Sun Oct 10 15:45:40 2010
HibernationDevice: RESUME=UUID=134a50fb-f806-49a6-a453-a70c194c879e
MachineType: ASUSTeK Computer Inc. G1S
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=3ad835ae-fb0d-41c0-a940-3377b3485c52 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
StagingDrivers: asus_oled ramzswap
Title: [STAGING]
WifiSyslog:
 Oct 10 15:36:34 nictop kernel: [ 3834.667562] lo: Disabled Privacy Extensions
 Oct 10 15:46:37 nictop kernel: [ 4436.911465] lo: Disabled Privacy Extensions
dmi.bios.date: 12/25/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 300
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: G1S
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr300:bd12/25/2007:svnASUSTeKComputerInc.:pnG1S:pvr1.0:rvnASUSTeKComputerInc.:rnG1S:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: G1S
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.

[Nicholaus Shupe (nicholaus-shupe)]

From lshw -C network as well:

  *-network
       description: Wireless interface
       product: PRO/Wireless 4965 AG or AGN [Kedron] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 61
       serial: 00:13:e8:35:14:2d
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlagn driverversion=2.6.35-22-generic firmware=228.61.2.24 ip=192.168.1.234 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
       resources: irq:47 memory:fe0fe000-fe0fffff

[Marco Cimmino (cimmo)]

I guess due to #630748

module-init-tools (3.12-1ubuntu2) maverick; urgency=low

  * Temporarily disable 11n functionality for iwlagn driver. Intel is
    actively working to get this properly fixed up in the firmware. This
    workaround should be reverted once updated firmware is available.
    LP: #630748
 -- Leann Ogasawara <email address hidden> Thu, 30 Sep 2010

[penalvch (penalvch)]

Nicholaus Shupe, thank you for reporting this and helping make Ubuntu better. Maverick reached EOL on April 2012.
Please see this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We were wondering if this is still an issue in a supported release? If so, can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command in a supported release from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux <replace-with-bug-number>

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]