If Sirius1977 has no problem with the rtl8188ce adaptor, then the problem with this adaptor is only on 32 bit systems. I can't use 32 bit systems, because there are no 64 bit drivers for the integrated graphics card on the Intel Atom 2600N.
I can't imagine the working well on Windows/terrible on Linux problem can be a router problem, since you don't change anything to the router. A router in mixed mode is in most cases slower. Switch it of if you don't need it.
If Sirius1977 has no problem with the rtl8188ce adaptor, then the problem with this adaptor is only on 32 bit systems. I can't use 32 bit systems, because there are no 64 bit drivers for the integrated graphics card on the Intel Atom 2600N.
I can't imagine the working well on Windows/terrible on Linux problem can be a router problem, since you don't change anything to the router. A router in mixed mode is in most cases slower. Switch it of if you don't need it.