WLAN and Wireless router incompatible?

[Michele Zarri]

Hello,

I think I'd better start by saying that I am a real newbie (installed
ubuntu a couple of weeks ago and have no previous experience with
Linux) and apologizing for the long post.

I have a dual boot (ubuntu/winxp) on a compaq N610 laptop which comes
with a USB Wireless Lan card (W200). At home I have set up a wireless
network using a D-Link 524 router.

This is the sequence of events describing the problem I am experiencing
- The access point has WEP enabled and works ok under WinXP.
- Started the WLAN card in ubunto and everything worked (got an IP
address and could connect to the internet and download some packages
too).
- After a few minutes I stopped receiving packets from the access point.
- tried to restart the WLAN sudo ifdown eth1 && sudo ifup eth 1 but
nothing happened
- Boot up in Winxp and could not get an IP address
- reset the access point and it worked again fine under winxp
- back to ubuntu and same story. Fine for 5 minutes then received
packets down to 0
- tried several things (manual IP address, removing the WEP
"security", switch off and on the WLAN, reset it, inspected the
iwconfig...)

Final note: I tried the WLAN running ubuntu on a public [famous
cellular operator name here] hotspot and it works fine, keeps the
connection up without a glitch.

So my questions:
- Is this a known problem?
- any guess on which of the two devices (compaq W200 WLAN or D-Link
524 wireless router) causes the problem?

Any suggestion will be most welcome.

Cheers,

Michele