How come my PS/2 mouse from MouseSystems does not seem to work?
There have been some reports that certain model of PS/2 mouse from MouseSystems works only if it is put into the “high resolution” mode. Otherwise, the mouse cursor may jump to the upper-left corner of the screen every so often. Unfortunately there is no workaround for versions 2.0.X and 2.1.X. In versions 2.2 through 2.2.5, apply the following patch to /sys/i386/isa/psm.c and rebuild the kernel. See the section on building a kernel if you have no experience with building kernels.
