A quick google search found that you can apparently accomplish this by adding "quiet splash consoleblank=0"
(you will want to include the quotation marks there also) to the GRUB_CMDLINE_LINUX_DEFAULT=
line in the /etc/default/grub
Make sure that the GRUB_CMDLINE_LINUX_DEFAULT=
line is uncommented also. It should be by default.
Then be sure to run sudo update-grub
for the changes to take effect. Then reboot and you should be good to go.