KVM Mouse Problem in Linux (XFree86, actually)

Problem::  When switching from CPU to CPU in a mixed OS environment, I kept losing the wheel portion of my wheelmouse.

Solution #1:  From reading many posts, I found it has to do with X's inability to deal with variable byte i/o from the mouse.   Until this is fixed by the XFree86 team, try Ctrl-Alt-F1 and then Ctrl-Alt-F7 to bring it back.

Solution #2:  Disable psm sync checking (with "flags 0x0100"), if that doesn't work, replacing your KVM may be the answer.

Jeff Borders