Mouse, KB and monitor pausing in w2100z suse 9.2 and 9.3

Hello All, Like clock work, every 5 seconds the w2100z systems pause for a fraction of a second then hurries to catch up to where it thinks it should be. The result is the mouse stops and jumps across the screen. The keyboard double types a letter(annoying when entering passwords). With glxgears, the gears seem to stop and go every 5 seconds. Any help would be appreciated. We have about 20 of these systems and many of them run suse 9.3. --ryan