The DLink DWL-650+ PCMCIA Wireless card doesn't work on recent Linux distros (I tried Ubuntu Hardy to Jaunty). After plugging in, the system hangs with CapsLock flashing.
Turns out the card is handled by acx module and the support is broken for this card. So use ndiswrapper instead.
First blacklist acx module. Open /etc/modprobe.d/blacklist.conf file and add the following line
blacklist acxNow install ndiswrapper
sudo apt-get install ndiswrapper-commonNow get the Windows driver for the card from here. Extract the file, go to the winxp folder and,
sudo ndiswrapper -i AIRPLUS.INFThe card should work now.