Re: Mouse pointer "crashes"
You may get better response if you post this over in The Apothecary. Lots of helpful folks there, and some who even speak Unix!
As for the problem, can't say I've got anything helpful to suggest. You can kill/restart the mouse driver if the Logitech software you've got supports it (or if you do some digging and find the driver name and the bat that starts it), but as far as I know there's no simple way to do it in Windows.
Re: Mouse pointer "crashes"
I'd suggest trying to run straight through and skip the KVM switch. I'm assuming you have non-USB keyboard and mouse. If you are using a pure USB solution, there may be something going on with your switch, but that doesn't make too much sence.