Wireless rate set as 11Mbps for a 54Mbps ap

Asked by Trevor Modha on 2007-05-20

Why is my network card only connecting at 11mb?

Can i use static ip address on my laptop with network-manager?

Question information

Language:
English Edit question
Status:
Answered
For:
Ubuntu network-manager Edit question
Assignee:
No assignee Edit question
Last query:
2007-05-23
Last reply:
2008-06-07
Cesare Tirabassi (norsetto) said : #1

Are you using the 802.11b wireless mode?

The maximum permitted by this standard is 11 Mbps
You can check the available rates with an iwlist rate command.

Do you have automatic tx rate on?

If so the driver may reduce the tx rate if the signal strength is below a certain threshold.
You can set this with a iwconfig rate command.

Concerning nm and static ip addresses, it appears from several reports that this feature is still not 100% working.
You may want to set this manually.

Trevor Modha (p-modha) said : #2

I am still a newB at linux. I have installed gnome networkmanager 0.6.4 but do not know how to interogate the software and were to look for the software in the system. Any dummy guide will be most appreciated.

Massimo Forti (slackwarelife) said : #3

Ok, to understand post the result of lspci (open a shell and do $: lspci). thanks

Trevor Modha (p-modha) said : #4

modhapd@modhapd-dellC400:~$ lspci
00:00.0 Host bridge: Intel Corporation 82830 830 Chipset Host Bridge (rev 04)
00:02.0 VGA compatible controller: Intel Corporation 82830 CGC [Chipset Graphics Controller] (rev 04)
00:02.1 Display controller: Intel Corporation 82830 CGC [Chipset Graphics Controller]
00:1d.0 USB Controller: Intel Corporation 82801CA/CAM USB (Hub #1) (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 42)
00:1f.0 ISA bridge: Intel Corporation 82801CAM ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801CAM IDE U100 (rev 02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801CA/CAM AC'97 Audio Controller (rev 02)
00:1f.6 Modem: Intel Corporation 82801CA/CAM AC'97 Modem Controller (rev 02)
02:00.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
02:01.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller (rev 02)

modhapd@modhapd-dellC400:~$ iwconfig eth1
eth1 IEEE 802.11b/g ESSID:"GURU" Nickname:"zd1211"
          Mode:Managed Frequency:2.462 GHz Access Point: 00:50:18:47:BF:0E
          Bit Rate=11 Mb/s
          Link Quality=100/100 Signal level=42/100
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Massimo Forti (slackwarelife) said : #5

Ok, your card support both b and g protocol. You must see your router. You must enable the g protocol in the router if you want to be able to use higt connection. Thanks many

Trevor Modha (p-modha) said : #6

Massimo,
Thanks for the reply. I have 2 laptops one with windows Xp Pro and the other with Ubuntu. Both have wire less the window supports and sees the same router at 54Mb/s but linux does not. can someone just tell me as to how can I over ride the network manager's settings. It is the networkmanager 0.6.4 that is choosing this speed but I do not have enough knowledge as to how to nevigate to see and interrogate the NM 0.6.4 and tell it to connect at 54Mbp/s. I want to uninstall NM 0.6.4 and install nw 0.6.5 and see if this will make any difference. Is there now way I can set the wireless card manually? I do not have enough knowledge about this linux but I am learning quickly.... I do appreciate. Can you send me an Idiot's guide how to uninstall nm 0.6.4 and reinstall the card manually....Believe me your help is most appreciated.

Massimo Forti (slackwarelife) said : #7

I don't think the problem is about the NM version. It is probably a driver setting error. You don't use a internal card, in your lspci I didn't see the wifi device. Thanks

Trevor Modha (p-modha) said : #8

The device I am using is a usb device.Not an internal built in card. Hope this helps.

modhapd@modhapd-dellC400:~$ iwconfig eth1
eth1 IEEE 802.11b/g ESSID:"GURU" Nickname:"zd1211"
          Mode:Managed Frequency:2.462 GHz Access Point: 00:50:18:47:BF:0E
          Bit Rate=11 Mb/s
          Link Quality=100/100 Signal level=42/100
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Massimo Forti (slackwarelife) said : #9

Ok, thanks, I need the result of this command:

$: lsusb

and

$: lsusb -v

with the usb wi-fi device plugin. Thanks

Trevor Modha (p-modha) said : #10

modhapd@modhapd-dellC400:~$ lsusb
Bus 001 Device 002: ID 0ace:1215 ZyDAS
Bus 001 Device 001: ID 0000:0000
modhapd@modhapd-dellC400:~$ lsusb -v

Bus 001 Device 002: ID 0ace:1215 ZyDAS
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 255 Vendor Specific Class
  bDeviceSubClass 255 Vendor Specific Subclass
  bDeviceProtocol 255 Vendor Specific Protocol
  bMaxPacketSize0 64
  idVendor 0x0ace ZyDAS
  idProduct 0x1215
  bcdDevice 48.10
  iManufacturer 16
  iProduct 32
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 46
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x80
      (Bus Powered)
    MaxPower 500mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 4
      bInterfaceClass 255 Vendor Specific Class
      bInterfaceSubClass 0
      bInterfaceProtocol 0
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x01 EP 1 OUT
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x82 EP 2 IN
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x83 EP 3 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 1
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x04 EP 4 OUT
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 0
can't get device qualifier: Operation not permitted
can't get debug descriptor: Operation not permitted
cannot read device status, Operation not permitted (1)

Bus 001 Device 001: ID 0000:0000
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 1.10
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 0 Full speed hub
  bMaxPacketSize0 64
  idVendor 0x0000
  idProduct 0x0000
  bcdDevice 2.06
  iManufacturer 3
  iProduct 2
  iSerial 1
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 25
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xe0
      Self Powered
      Remote Wakeup
    MaxPower 0mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 9 Hub
      bInterfaceSubClass 0 Unused
      bInterfaceProtocol 0 Full speed hub
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0002 1x 2 bytes
        bInterval 255
can't get hub descriptor: Operation not permitted
cannot read device status, Operation not permitted (1)
modhapd@modhapd-dellC400:~$

Hope this will help!

Trevor Modha (p-modha) said : #11

I am sending you this message using windows XP...... and the same usb wifi dongle and it is connected at 54Mbp/s.So this just proves that it is the software on ubuntu that is restricting the connecting speed. Can some one please write the instructions in the simplest form for Novice like me to follow. I would like to uninstall the network manager and create a new wpa_supplicant folder and configure if you could guide me through that I would be much obliged.

Kind regards,
Pravin modha

Trevor Modha (p-modha) said : #12

USB\VID_0ACE&PID_1215\5&2EE2E596&0&4
Physical Address: 00-02-72-5F-9A-02
IP Address: 192.168.0.2
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.0.1
DHCP Server: 192.168.0.1
Lease Obtained: 23/05/2007 05:39:17
Lease Expires: 26/05/2007 05:39:17
DNS Server: 192.168.0.1
WINS Server:

Massimo Forti (slackwarelife) said : #13

Ok, put in the usb wi-fi device, after do in a shell:

$: sudo iwconfig wlan0 rate 54M

After see the bit rate using iwconfig. Let me know (your hardware is well supported by Ubuntu). Thanks

Trevor Modha (p-modha) said : #14

modhapd@modhapd-dellC400:~$ sudo iwconfig wlan0 rate 54M
Error for wireless request "Set Bit Rate" (8B20) :
    SET failed on device wlan0 ; No such device.
modhapd@modhapd-dellC400:~$ lwconfig
bash: lwconfig: command not found
modhapd@modhapd-dellC400:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

eth1 IEEE 802.11b/g ESSID:"GURU" Nickname:"zd1211"
          Mode:Managed Frequency:2.462 GHz Access Point: 00:50:18:47:BF:0E
          Bit Rate=11 Mb/s
          Link Quality=98/100 Signal level=34/100
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

modhapd@modhapd-dellC400:~$

Massimo Forti (slackwarelife) said : #15

Sorry I mistake. You can do this:

sudo iwconfig eth1 rate 54M

you wi-fi device is eth1 and not wlan0

Thanks

georgielove (gorkaamor) said : #16

Hi everybody,
How should i do to get that wireless config after doing that (sudo iwconfig eth1 rate 54M)? Since every time i change the connection or reboot the computer the rate decreases to 11 mbps.

Cheers

thopv (thopv) said : #17

Add this line in your /etc/network/interfaces

wireless-rate 54M

and it works.

Hooya (tjbassoon) said : #18

So adding that line to my /interfaces file does properly set the rate at initial boot, but after coming out of hibernate it's back to 1M and I have to do the terminal command to get it back up. Is there a way to get this to fix automatically after coming out of hibernate/suspend as well?

Can you help with this problem?

Provide an answer of your own, or ask Trevor Modha for more information if necessary.

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