Comment # 2 on bug 941931 from Michael Chang

Hi Jan,

Can you please test by disabling theme and with gfxterm and background ? It's
simple to do that by editing /etc/default/grub and commenting out the
GRUB_THEME=..

  GRUB_BACKGROUND=/boot/grub2/themes/openSUSE/background.png
  # GRUB_THEME=/boot/grub2/themes/openSUSE/theme.txt

After that, run grub2-mkconfig -o /boot/grub2/grub.cfg

I think we need to check whether it's related to how grub's theme rendering and
compositing things to target . And if you still experience slowness with
gfxterm, I suspect it's more related with firmware as the flipping to
front/display buffer is somehow slow in larger resolution..

Thanks.