Hi List, I don't know how many people in the list have played with cubieboard. It is really fun :D The Sad thing is that, I have a usb wireless adapter TL-WN721N(with 9271 chipset) that doesn't work on the board. The system is Cubian Linux(derieved from Debian for the cubieboard). I googled around, find the driver is called "ath9k_htc". Later, I find the driver's source code in the kernel for Cubian. I compiled it but all I'd got is this: In file included from include/linux/timex.h:174:0, from include/linux/jiffies.h:8, from include/linux/ktime.h:25, from include/linux/timer.h:5 from include/linux/workqueue.h:8, from include/linux/kmod.h:26 from include/linux/module.h:13 from /home/cubie/src/ath9k/htc.h:20, from /home/cubie/src/ath9k/htc_hst.c:17: /usr/src/linux-headers-3.4.79-sun7i/arch/arm/include/asm/timex.h:15:24: fatal error: mach/timex.h: No such file or directory How can I deal with this error? Does the existence of the driver's code in the kernel source means that it has already been ported to Cubian? You can get more information about Cubian and its kernel source in: http://cubian.org/sources/ Thanks for your attention! Freeman Zhang