'ls linux-2.6.xx.x/drivers/char/sx* '
sxboards.h : ... describing the SX/SI/XIO board hardware
Other files : sx.c , sx.h , sxwindow.h
Googling .. sx: sent the force_close command ..
Please have a look for yourself ..
http://www.google.com/linux
in the Tux tool.
I do not know this hardware, seems present your computer. ?
ls /lib/modules/2.6.xx.x/kernel/drivers/char/sx.ko(.gz)
i.e. the module = 'sx'
.....