On Fri, 2006-06-02 at 22:14 -0500, Erick Perez wrote: > Being a no-programer but more a sysadmin....Can someone explain to me > how to change this in an INTEL motherboard D945GNT with a Pentium D > (dual core) ? To test kernel parameters, it is best to try the parameter for one boot first. The following page describes how you can add an extra boot option from the GRUB boot loader menu (read the "Menu Entry Editor Interface" section): http://www.centos.org/docs/4/html/rhel-rg-en-4/s1-grub-interfaces.html So, you can edit the entry for your default kernel by selecting it from the GRUB menu, and pressing 'e'. Then edit the "kernel" line with 'e', and add: clock=pmtmr and if that doesn't help, add clock=pit If one of these parameters solve your problem, you can permanently change the GRUB configuration to boot the kernel with this parameter by modifying /boot/grub/menu.list. This page describes that file: http://www.centos.org/docs/4/html/rhel-rg-en-4/s1-grub-configfile.html In menu.lst, you can add the parameter to the "kernel" stanza for your default kernel. -- Daniel