And we have a winner!!!!!!!!!!!!!!! Thank you Craig! psmouse.proto=bare I tried 5 other solutions that had no effect, but this works great. Just so you know I'm not completely clueless, I was aware of the need to reboot to test the kernel parameters. As far as the Belkin switch being of the cheap variety, far from it. This unit cost around $400.00 several years ago and has been rock-solid with all systems until this Centos 4.2 install. (my first 2.6.x kernel system) My question regarding the Ubuntu solution below had to do with the fact that /etc/modules does not exist on the CentOS system. I assume it resides somewhere else in the filesystem. Regards, Chaz Charles L. Sliger, Information Systems Engineer, chaz at bctonline.com "no matter where you go, there you are..." -----Original Message----- From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Craig White Sent: Friday, January 27, 2006 6:42 PM To: CentOS mailing list Subject: RE: [CentOS] CentOS 4.2 Mouse Tracking Unstable On Fri, 2006-01-27 at 18:34 -0800, Charles Sliger wrote: > I saw the following fix for this problem on 2.6.x Ubuntu systems where the > kernel parameters had no effect: > > /etc/modules > mousedev > psmouse proto=exps > > What is the equivalent for CentOS? > ---- it's what you tried and you said that it didn't work (appending psmouse.proto=exps to kernel boot line in grub) recognize that you must reboot for the setting to take root. Myself, I have resorted to psmouse.proto=bare because that works and the only drawback is that the mouse wheel doesn't work. The Belkin switches are the problem. I'm too cheap to buy another brand but I probably should just bite the bullet. The 2.6 kernel obviously has timing issues which causes this to occur on the Belkin switches. I don't believe that this is a distribution or driver issue but rather a kernel issue. Whether you replace the Belkin switch with another brand or resort to one of the techniques such as psmouse.proto=bare is your choice. Craig _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos