I have WPC11 ver 3 working with redhat. I had a ver 4 and traded it in.
The problem is that v. 4 seems to have a completely different chip
snuck in, a RealTek 8180. RealTek has released a Linux driver
for this which I tried a while ago and could not get to work
No doubt it's improved since then and I'm eager to know how it works:
Here's link claiming victory and describing it: