If I leave the computer idle for more than 10 seconds, when
I then hit any key or move the mouse, the screen jumps in
the verticle direction for a moment and then returns to
The computer is a NEC versa 6200 MMX,
with a C&T 65550 video chip.
Note: This "feature" has been noted on another NEC machine,
the NEC Versa 6050.
This "feature" should have been removed with XFree86 3.3.6.