Comment 0 for bug 1319630

Summary: Almost 10 times slower speeds using 14.04 compared with 12.04 (same machine). Using iperf, Precise: 172 Mbits/sec. Trusty: 27.4 Mbits/sec. Using rsync: Precise: 19.83MB/s. Trusty: 3.12MB/s.

Details:

Machine:
    Laptop Toshiba Satellite A665
    Triple boot Ubuntu 12.04, 13.04 and 14.04

Network (same network for both):
    d-link router
    5Ghz rage

Wireless card: Centrino

$ lspci -nnk | grep -iA2 network
07:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N + WiMAX 6250 [Kilmer Peak] [8086:0087] (rev 5f)
 Subsystem: Intel Corporation Centrino Advanced-N + WiMAX 6250 2x2 AGN [8086:1301]
 Kernel driver in use: iwlwifi

12.04 Trusty
#######################################################################

$ lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 12.04.4 LTS
Release: 12.04
Codename: precise

 $ uname -a
Linux vanhalen 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

$ iperf -c reinhardt
------------------------------------------------------------
Client connecting to reinhardt, TCP port 5001
TCP window size: 23.5 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.105 port 43135 connected with 192.168.1.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 206 MBytes 172 Mbits/sec

$ rsync -vP LAS.s22e10.432p.mp4 reinhardt:./
user@reinhardt's password:
LAS.s22e10.432p.mp4
   235861112 100% 19.83MB/s 0:00:11 (xfer#1, to-check=0/1)

sent 235889984 bytes received 31 bytes 14296364.55 bytes/sec
total size is 235861112 speedup is 1.00

14.04 Trusty
#######################################################################

$ lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty

$ uname -a
Linux vanhalen 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

$ iperf -c reinhardt
------------------------------------------------------------
Client connecting to reinhardt, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.105 port 49807 connected with 192.168.1.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.1 sec 32.9 MBytes 27.4 Mbits/sec

$ rsync -e "ssh -p2312" -vP LAS.s22e10.432p.mp4 reinhardt:./
user@reinhardt's password:
LAS.s22e10.432p.mp4
    235,861,112 100% 3.12MB/s 0:01:12 (xfr#1, to-chk=0/1)

sent 235,918,776 bytes received 34 bytes 2,930,668.45 bytes/sec
total size is 235,861,112 speedup is 1.00

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-extra-3.13.0-24-generic 3.13.0-24.47
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: pablo 1977 F.... pulseaudio
 /dev/snd/controlC0: pablo 1977 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed May 14 22:38:47 2014
HibernationDevice: RESUME=UUID=fed461e0-ae63-4fb1-8d92-8140a1b06551
InstallationDate: Installed on 2014-05-13 (2 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: TOSHIBA Satellite A665
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=77c75c70-93b5-41fa-984c-4fa7f9473ffc ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-24-generic N/A
 linux-backports-modules-3.13.0-24-generic N/A
 linux-firmware 1.127.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/14/10
dmi.bios.vendor: TOSHIBA
dmi.bios.version: 1.80
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: NWQAA
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.00
dmi.chassis.asset.tag: *
dmi.chassis.type: 9
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnTOSHIBA:bvr1.80:bd09/14/10:svnTOSHIBA:pnSatelliteA665:pvrPSAW3U-0DE039:rvnTOSHIBA:rnNWQAA:rvr1.00:cvnTOSHIBA:ct9:cvrN/A:
dmi.product.name: Satellite A665
dmi.product.version: PSAW3U-0DE039
dmi.sys.vendor: TOSHIBA