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[Aaron Whitehouse <1450755@xxxxxxxxxxxxxxxxxx>]

This issue still persists in 15.10.

$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 192.168.0.102 port 5001 connected with 192.168.0.2 port 49287
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  83.9 MBytes  70.2 Mbits/sec
[  5] local 192.168.0.102 port 5001 connected with 192.168.0.2 port 49294
[  5]  0.0-10.0 sec  78.4 MBytes  65.6 Mbits/sec
[  4] local 192.168.0.102 port 5001 connected with 192.168.0.2 port 49296
[  4]  0.0-10.0 sec  84.5 MBytes  70.8 Mbits/sec
[  5] local 192.168.0.102 port 5001 connected with 192.168.0.2 port 55344
[  5]  0.0-10.0 sec  14.5 MBytes  12.2 Mbits/sec
[  4] local 192.168.0.102 port 5001 connected with 192.168.0.2 port 55346
[  4]  0.0-10.2 sec  14.4 MBytes  11.8 Mbits/sec
[  5] local 192.168.0.102 port 5001 connected with 192.168.0.2 port 55348
[  5]  0.0-10.2 sec  11.2 MBytes  9.27 Mbits/sec

The first three results are on Windows 7, second three are on Ubuntu
15.10. Same laptop in the same place.

Kernel version is 4.2.0-25-generic

I can install the mainline kernel again to try to help. You asked
whether switching 802.11 type made any difference on the mainline kernel
- what is the easiest way to switch between these 802.11 types?

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1450755

Title:
  Intel Wireless-N 2230 4x faster in Windows 7 than 15.04 (iwlwifi)

Status in linux package in Ubuntu:
  Expired

Bug description:
  My Intel wireless card is significantly slower in Ubuntu than it is in
  Windows 7. Turning off Power Management didn't change anything.

  According to iperf (with the laptop a couple of feet from the router and the server plugged into it):
  == Ubuntu 15.04 ==
  [  4] local 192.168.0.102 port 5001 connected with 192.168.0.3 port 43672
  [ ID] Interval       Transfer     Bandwidth
  [  4]  0.0-10.1 sec  23.2 MBytes  19.3 Mbits/sec

  == Windows 7 ==
  [  4] local 192.168.0.102 port 5001 connected with 192.168.0.3 port 49247
  [  4]  0.0-10.1 sec  98.4 MBytes  82.0 Mbits/sec

  Transfer rates for previous Ubuntu releases are about the same:
  --
  13.10:
  [ ID] Interval       Transfer     Bandwidth
  [  3]  0.0-10.1 sec  22.6 MBytes  18.9 Mbits/sec

  --
  14.10
  [ ID] Interval       Transfer     Bandwidth
  [  3]  0.0-10.1 sec  27.8 MBytes  23.1 Mbits/sec

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  aaron      2193 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri May  1 10:37:38 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-04-26 (734 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Dell Inc. Inspiron 5423
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-15-generic root=UUID=e429a76e-75c0-44b9-90d4-a75ee21d98a2 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-25 (5 days ago)
  dmi.bios.date: 08/03/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 0RMVR3
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A03
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd08/03/2012:svnDellInc.:pnInspiron5423:pvrNotSpecified:rvnDellInc.:rn0RMVR3:rvrA03:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron 5423
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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