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[Bug 1390213] [NEW] Slow wireless when using RT3572

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Public bug reported:

Hi, I use Tenda w522u dual band wireless adapter (RT3572) and although
it CAN see networks and CAN connect to them, the bandwith is really
terrible. The internet is very slow although with another wireless
adapter it is much better (600Kbits/sec versus 15Mbit/sec aproximately)
It seems the driver is somehow bad.

I did not install the proprietary version of driver (I do not want to
compile every time I upgrade kernel)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-39-generic 3.13.0-39.66
ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
Uname: Linux 3.13.0-39-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  zabava     1497 F.... pulseaudio
 /dev/snd/controlC1:  zabava     1497 F.... pulseaudio
 /dev/snd/controlC0:  zabava     1497 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Nov  6 21:17:04 2014
HibernationDevice: RESUME=UUID=f531c361-af5a-40ba-b586-25ffa87079fb
InstallationDate: Installed on 2014-11-05 (1 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: ASUS All Series
ProcEnviron:
 LANGUAGE=cs
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=cs_CZ.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic.efi.signed root=UUID=d3852247-cdf6-4e1b-bf18-a7959624925f ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-39-generic N/A
 linux-backports-modules-3.13.0-39-generic  N/A
 linux-firmware                             1.127.7
RfKill:
 2: phy2: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0602
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: AM1I-A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0602:bd07/11/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnAM1I-A:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1390213

Title:
  Slow wireless when using RT3572

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Hi, I use Tenda w522u dual band wireless adapter (RT3572) and although
  it CAN see networks and CAN connect to them, the bandwith is really
  terrible. The internet is very slow although with another wireless
  adapter it is much better (600Kbits/sec versus 15Mbit/sec
  aproximately) It seems the driver is somehow bad.

  I did not install the proprietary version of driver (I do not want to
  compile every time I upgrade kernel)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-39-generic 3.13.0-39.66
  ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
  Uname: Linux 3.13.0-39-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  zabava     1497 F.... pulseaudio
   /dev/snd/controlC1:  zabava     1497 F.... pulseaudio
   /dev/snd/controlC0:  zabava     1497 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Nov  6 21:17:04 2014
  HibernationDevice: RESUME=UUID=f531c361-af5a-40ba-b586-25ffa87079fb
  InstallationDate: Installed on 2014-11-05 (1 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: ASUS All Series
  ProcEnviron:
   LANGUAGE=cs
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=cs_CZ.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic.efi.signed root=UUID=d3852247-cdf6-4e1b-bf18-a7959624925f ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-39-generic N/A
   linux-backports-modules-3.13.0-39-generic  N/A
   linux-firmware                             1.127.7
  RfKill:
   2: phy2: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/11/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0602
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: AM1I-A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0602:bd07/11/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnAM1I-A:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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