I followed these instructions and still can't get AP working on the same interface. I have these devices:
Ralink corp. RT3060 Wireless 802.11n 1T/1R is giving me an error:
RTNETLINK answers: No buffer space available
Linksys WUSB600N v2 Dual-Band Wireless-N Network Adapter [Ralink RT3572] (USB wifi adaptor):
RTNETLINK answers: Device or resource busy
these errors occur when I start second virtual interface on the same wifi device. What wifi adaptors support two virtual interfaces? What should I look for in hardware specifications? Maybe there are already known USB wifi adaptors that could work as AP and uplink at once?