View Full Version : [ubuntu] Having trouble with Wireless Connection

September 20th, 2009, 04:46 PM
I am new to Linux and exploring the idea of switching from Windows. For now I have set up a Windows dual boot. I have an unsecured wireless lan in place (lynksis) with a range expander. I can connect all day long when I boot into Windows XP. However, when I boot up under Linux (9.04) I am only able to connect for short periods of time. The signal indicator usually only gives me 2 or three bars under Linux, while I get an "Excellent" connection indicator in Windows. Once my connection drops under linux, I cannot re-establish it unless I power down the machine and reboot it. Help!


September 20th, 2009, 05:53 PM
I had a similar problem regarding wireless range. Try to use the following command to check if it will be fixed:

sudo iwconfig <wlan0> rate 5.5M

where in <wlan0> put the name of the wireless interface.
If you don't know what it is, run the command:


and you will get a list of interfaces. The one that has frequency, mode etc info is the wireless one.

September 20th, 2009, 07:49 PM
Thank You. I tried the command but received an error "no such device". Did I enter this incorrecly? See below

~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11abg ESSID:"linksys"
Mode:Managed Frequency:2.437 GHz Access Point: 00:0F:66:79:E9:DC
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry min limit:7 RTS thr:off Fragment thr=2352 B
Power Management:off
Link Quality=67/100 Signal level:-56 dBm Noise level=-93 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

$ sudo iwconfig linksys rate 5.5M
Error for wireless request "Set Bit Rate" (8B20) :
SET failed on device linksys ; No such device.