[CentOS] ps/2 mouse stopped working

Hi there,

I was using a ps/2 mouse.

I had to connect a ps/2 keyboard. As I have only one ps/2 socket I
connected an usb mouse.

I then removed the other keyboard and reconnected the ps/2 mouse and
removed the usb mouse.

Now the ps/2 mouse does not work, even after reboot. What should I do?

- Gergely