Hello all, I found that the Fedora Core 4 is only can use USB mouse and failed to reconfigure to use serial mouse such as using COM1-4. I found from the other board and tested it is work as follows:- Quote started ==================== Here is what I do to fix for FC4 (both x86-32 and x86-64) for serial mice: 1. Log into console or text mode as root. 2. Run mouseconfig - set up for serial mouse, ignore any error messages. 3. Use your favourite editor to open /etc/sysconfig/mouse 4. The last line should contain /dev/mice - change this to /dev/ttyS? where the question mark refers to the port your mouse is plugged into. 5. Save /etc/sysconfig/mouse 6. Run service gpm start and when you go back to X (Gnome / KDE) the mouse should work. ================= Quote ended #Note the gpm cannot restart after mouseconfig done and just work after reboot as I tried. And I wonder why the author didn't fix the problem permanently so need to fix it manually. Hope that can help other people. Wong Kwok Hon