kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Carl G, thank you for reporting this and helping make Ubuntu better.
Could you please confirm this issue exists with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains,
please just make a comment to this.

** Tags added: bios-outdated-a19

** Tags added: needs-bisect needs-upstream-testing regression-update

** Summary changed:

- linux-image-3.11.0-15-generic appears to regress connection speed for iwlwifi
+ 8086:422b [Dell Latitude E6520] linux-image-3.11.0-15-generic appears to regress connection speed for iwlwifi

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https://bugs.launchpad.net/bugs/1270208

Title:
  8086:422b [Dell Latitude E6520] linux-image-3.11.0-15-generic appears
  to regress connection speed for iwlwifi

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I recently installed 13.10 and immediately updated to the latest
  updates via my ethernet work connection.

  Got home and noted that linux-image-3.11.0-15-generic was only able to
  transfer to my local media box via wifi at ~350kB/s (ie. Taking 10+
  minutes for a 300Mb file)

  After trawling the net for a while, the usual solution appeared to be
  "restart with 11n_disable=1 as a module option."

  That didn't solve the issue not did several other suggestions. So I
  reverted to the other kernal installed on my system linux-
  image-3.11.0-12-generic

  After booting that kernel my transfer speeds are ~3MB/s - much saner
  (though I have had things configured so I get closer to 6MB/s)

  Not sure what other info I can provide.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-12-generic 3.11.0-12.19 [modified: boot/vmlinuz-3.11.0-12-generic]
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  carlos     2193 F.... pulseaudio
   /dev/snd/controlC0:  carlos     2193 F.... pulseaudio
  Date: Fri Jan 17 23:59:56 2014
  HibernationDevice: RESUME=UUID=0fbe8395-5e8d-430f-823c-b5408451c73e
  InstallationDate: Installed on 2014-01-14 (3 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. Latitude E6520
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_AU:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 inteldrmfb
   1 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=22c75466-3cb5-416a-9513-8debe4246bcd ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/11/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A14
  dmi.board.name: 0J4TFW
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA14:bd07/11/2012:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0J4TFW:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6520
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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