kernel-packages team mailing list archive

[Martin Konopka <1289712@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

I am trying to transfer data between two notebooks connected using their
Wi-Fi radios.

Machine 1:  HP ZBook 15 configured to serve as a Wi-Fi hotspot. Network
controller: Intel Corporation Centrino Advanced-N 6235 (rev 24). The
machine also has a mobile broadband USB device (Huawei E3251) which
connects it to the internet.

Machine 2: Fujitsu-Siemens AMILO Pro V3205. It is connected to machine 1
using wireless adapter. Network controller: Intel Corporation
PRO/Wireless 3945ABG [Golan] Network Connection (rev 02).

Both machines run latest development version of ubuntu 14.04. (Machine 1
a 64-bit system, machine 2 a 32-bit system.) The Wi-Fi hotspot (running
on machine 1) employs the WEP authentication. The connection speed is
only about  0.1 MiB/s, i.e. about 0.8 Mbps. This is far below what the
Wi-Fi adapters in both machines are able to do. The particular program I
used was rsync. The data were transferred from machine 2 to machine 1.
The speed was the same slow for rsync invoked either on machine 1 or 2.

Yesterday I tried a different way to connect the two laptops: I created
a Wi-Fi hotspot using an android smartphone with a WPA2 PSK
autentication. That other wireless connection between the two laptops
was at least one order of magnitude faster. (I do not remember precise
number but surely it was much much faster.)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-16-generic 3.13.0-16.36
ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
Uname: Linux 3.13.0-16-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  konopka    1643 F.... pulseaudio
 /dev/snd/controlC0:  konopka    1643 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Mar  8 08:01:34 2014
HibernationDevice: RESUME=UUID=bed0cd64-3da5-43a7-b4a7-6cc72965a402
InstallationDate: Installed on 2014-01-31 (35 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130)
MachineType: Hewlett-Packard HP ZBook 15
ProcFB:
 0 inteldrmfb
 1 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-16-generic root=UUID=56c3d081-90f2-445f-ade1-574586237cd6 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-16-generic N/A
 linux-backports-modules-3.13.0-16-generic  N/A
 linux-firmware                             1.126
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/25/2013
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L70 Ver. 01.06
dmi.board.name: 1909
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 94.47
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrL70Ver.01.06:bd10/25/2013:svnHewlett-Packard:pnHPZBook15:pvrA3009DD10303:rvnHewlett-Packard:rn1909:rvrKBCVersion94.47:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP ZBook 15
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard

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


** Tags: amd64 apport-bug trusty

-- 
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https://bugs.launchpad.net/bugs/1289712

Title:
  extremly slow wireless connection between two notebooks

Status in “linux” package in Ubuntu:
  New

Bug description:
  I am trying to transfer data between two notebooks connected using
  their Wi-Fi radios.

  Machine 1:  HP ZBook 15 configured to serve as a Wi-Fi hotspot.
  Network controller: Intel Corporation Centrino Advanced-N 6235 (rev
  24). The machine also has a mobile broadband USB device (Huawei E3251)
  which connects it to the internet.

  Machine 2: Fujitsu-Siemens AMILO Pro V3205. It is connected to machine
  1 using wireless adapter. Network controller: Intel Corporation
  PRO/Wireless 3945ABG [Golan] Network Connection (rev 02).

  Both machines run latest development version of ubuntu 14.04. (Machine
  1 a 64-bit system, machine 2 a 32-bit system.) The Wi-Fi hotspot
  (running on machine 1) employs the WEP authentication. The connection
  speed is only about  0.1 MiB/s, i.e. about 0.8 Mbps. This is far below
  what the Wi-Fi adapters in both machines are able to do. The
  particular program I used was rsync. The data were transferred from
  machine 2 to machine 1. The speed was the same slow for rsync invoked
  either on machine 1 or 2.

  Yesterday I tried a different way to connect the two laptops: I
  created a Wi-Fi hotspot using an android smartphone with a WPA2 PSK
  autentication. That other wireless connection between the two laptops
  was at least one order of magnitude faster. (I do not remember precise
  number but surely it was much much faster.)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-16-generic 3.13.0-16.36
  ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
  Uname: Linux 3.13.0-16-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  konopka    1643 F.... pulseaudio
   /dev/snd/controlC0:  konopka    1643 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Mar  8 08:01:34 2014
  HibernationDevice: RESUME=UUID=bed0cd64-3da5-43a7-b4a7-6cc72965a402
  InstallationDate: Installed on 2014-01-31 (35 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130)
  MachineType: Hewlett-Packard HP ZBook 15
  ProcFB:
   0 inteldrmfb
   1 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-16-generic root=UUID=56c3d081-90f2-445f-ade1-574586237cd6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-16-generic N/A
   linux-backports-modules-3.13.0-16-generic  N/A
   linux-firmware                             1.126
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L70 Ver. 01.06
  dmi.board.name: 1909
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 94.47
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrL70Ver.01.06:bd10/25/2013:svnHewlett-Packard:pnHPZBook15:pvrA3009DD10303:rvnHewlett-Packard:rn1909:rvrKBCVersion94.47:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ZBook 15
  dmi.product.version: A3009DD10303
  dmi.sys.vendor: Hewlett-Packard

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