1、执行以下命令。
echo FRAMEBUFFER=y | sudo tee /etc/initramfs-tools/conf.d/splash
sudo update-grub2
sudo update-initramfs -u2、执行以下命令。
sudo apt-get install v86d
sudo -H gedit /etc/default/grub3、编辑文件：/etc/default/grub。
GRUB_GFXMODE=1920x1080x24
GRUB_GFXPAYLOAD_LINUX=keep4、执行以下命令。
echo FRAMEBUFFER=y | sudo tee /etc/initramfs-tools/conf.d/splash
sudo update-initramfs -u
sudo update-grub参考文档1：https://askubuntu.com/questions/10457/how-to-enable-the-boot-splash-screen
参考文档2：https://askubuntu.com/questions/362722/how-to-fix-plymouth-splash-screen-in-all-ubuntu-releases