Hello. In my laptop I have one serial port but I can see /dev/ttyS0 through /dev/ttyS3. How do I know which kernel code (or module) is driving those devices ? (major 4, minor 64 through 67) how can I identify the serial driver ? is there a sys entry for that ? Thank You, naziir -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/