Comment 14 for bug 118205

The problem is that lowlevel drivers (rt2400pci.ko, rt2500pci.ko, rt2500usb.ko, rt61pci.ko, rt73usb.ko) are not built, only the high level drivers (rt2x00lib.ko, rt2x00pci.ko, rt2x00usb.ko) are.
The root cause of this seems to be that the .config is not automatically included in recursive targets
Other modules subdirs are affected : fs/asfs media/lirc misc/ndiswrapper

This patch against current ubuntu-gutsy-lum git tree (491aaa043eb8d65c6c55327c3a0214e578814681) fix this (only for the rt2x00 subdir)
The resulting lum package let my rt2500pci card work with network-manager (WEP, didn't try WPA)