kernel-packages team mailing list archive

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

** Summary changed:

- iwlwifi: tx speed regression with kernel 3.11.0-15-generic [Dell Latitude E6510]
+ 8086:422c [Dell Latitude E6510] iwlwifi: tx speed regression with kernel 3.11.0-15-generic

** Description changed:

  Kernel 3.11.0-15-generic appears to regress iwlwifi performance
- significantly.
- 
- I get about 400-500KiB/s sustained transfer rate with 3.11.0-15-generic,
- while speed is over 7MiB/s with either 3.11.0-12-generic or mainline
- kernel v3.11.10.3-saucy (same access point).
- 
- This  bug is likely dupe of bug 1270208, but I was asked to file it
- separately due to hardware differences.
+ significantly. I get about 400-500KiB/s sustained transfer rate with
+ 3.11.0-15-generic, while speed is over 7MiB/s with either
+ 3.11.0-12-generic or mainline kernel v3.11.10.3-saucy (same access
+ point).
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-15-generic 3.11.0-15.23
  ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
  Uname: Linux 3.11.0-15-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  oyvind     2102 F.... pulseaudio
   /dev/snd/controlC0:  oyvind     2102 F.... pulseaudio
  Date: Tue Jan 21 21:13:24 2014
  HibernationDevice: RESUME=UUID=0f94207f-b6d7-4b98-8f13-eaaeebb896b1
  InstallationDate: Installed on 2013-11-02 (80 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. Latitude E6510
  MarkForUpload: True
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=nb_NO:nb:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=nb_NO.UTF-8
   SHELL=/bin/bash
  ProcFB:
  
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=7816e956-27c6-48c4-9ce2-3b22b5842157 ro quiet nosplash nouveau.perflvl_wr=7777
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-15-generic N/A
   linux-backports-modules-3.11.0-15-generic  N/A
   linux-firmware                             1.116.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/05/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A16
  dmi.board.name: 0N5KHN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA16:bd12/05/2013:svnDellInc.:pnLatitudeE6510:pvr0001:rvnDellInc.:rn0N5KHN:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6510
  dmi.product.version: 0001
  dmi.sys.vendor: Dell Inc.

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https://bugs.launchpad.net/bugs/1271307

Title:
  8086:422c [Dell Latitude E6510] iwlwifi: tx speed regression with
  kernel 3.11.0-15-generic

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Kernel 3.11.0-15-generic appears to regress iwlwifi performance
  significantly. I get about 400-500KiB/s sustained transfer rate with
  3.11.0-15-generic, while speed is over 7MiB/s with either
  3.11.0-12-generic or mainline kernel v3.11.10.3-saucy (same access
  point).

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-15-generic 3.11.0-15.23
  ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
  Uname: Linux 3.11.0-15-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  oyvind     2102 F.... pulseaudio
   /dev/snd/controlC0:  oyvind     2102 F.... pulseaudio
  Date: Tue Jan 21 21:13:24 2014
  HibernationDevice: RESUME=UUID=0f94207f-b6d7-4b98-8f13-eaaeebb896b1
  InstallationDate: Installed on 2013-11-02 (80 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. Latitude E6510
  MarkForUpload: True
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=nb_NO:nb:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=nb_NO.UTF-8
   SHELL=/bin/bash
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=7816e956-27c6-48c4-9ce2-3b22b5842157 ro quiet nosplash nouveau.perflvl_wr=7777
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-15-generic N/A
   linux-backports-modules-3.11.0-15-generic  N/A
   linux-firmware                             1.116.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/05/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A16
  dmi.board.name: 0N5KHN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA16:bd12/05/2013:svnDellInc.:pnLatitudeE6510:pvr0001:rvnDellInc.:rn0N5KHN:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6510
  dmi.product.version: 0001
  dmi.sys.vendor: Dell Inc.

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