Check in /boot/grub/menu.list. If it says splash=verbose in the boot stanza, change it to splash=silent. This must be done as root (file manager superuser mode).
gksu leafpad /boot/grub/menu.lst brings up:
title linux
kernel (hd0,0)/boot/vmlinuz BOOT_IMAGE=linux root=UUID=22834d68-7dc5-4a9d-b694-6aa72de3dac4 resume=UUID=0cb871f4-fa73-47cc-97ba-dbf7c4295073
initrd (hd0,0)/boot/initrd.img
title failsafe
kernel (hd0,0)/boot/vmlinuz BOOT_IMAGE=failsafe root=UUID=22834d68-7dc5-4a9d-b694-6aa72de3dac4 failsafe
initrd (hd0,0)/boot/initrd.img