xorg-x11

x11-base/xorg-server-1.0.2-r7

x11-base/xorg-x11-7.0-r1

 x11-drivers/xf86-video-vesa-1.0.1.3

x11-drivers/xf86-input-mouse-1.0.4

x11-drivers/xf86-input-keyboard-1.0.1.3

xorg.conf

    Identifier  "Mouse1"
    Driver      "mouse"
    Option "Protocol"    "IMPS/2"       # Auto detect
    Option "Device"      "/dev/misc/psaux"

cat /dev/misc/psaux

测试mouse...