VMware guest slow fast clock timer fix

If your VMware Player / Server / Workstation / ESX CentOS, gNewSense, RHEL or Ed/X/Ubuntu guest clock timer is running too slowly you may need to add “clock=pit” to your kernel command line !

If you are running a CentOS 4 or Red Hat RHEL 4 guest :

# vi /boot/grub/menu.lst

kernel /vmlinuz-2.6.9-22.EL ro root=LABEL=/ rhgb quiet clock=pit

If you are running a gNewSense 1.x.y or Ubuntu 6.x.y guest :

# vi /boot/grub/menu.lst

and add “clock=pit” to the “defoptions” “comment”

# defoptions=quiet splash clock=pit

run

# update-grub

then

# cat menu.lst

and check kernel line now contains “clock=pit”

kernel /boot/vmlinuz-2.6.15-28-686 root=/dev/sda1 ro quiet splash clock=pit

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