This guide shall help you out in getting silent boot experience similar to macOS and Windows on Ubuntu on T2 Macs.
-
On the terminal, run
sudo gnome-text-editor /etc/default/grub
-
Change
GRUB_CMDLINE_LINUX_DEFAULT=""
toGRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
. If this is already done then directly follow step 4. -
Run
sudo update-grub
-
Now run
echo FRAMEBUFFER=y | sudo tee /etc/initramfs-tools/conf.d/splash
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Finally, update your initramfs by running
sudo update-initramfs -u
Warnings regarding possible missing firmware for gpu may be ignored. Though you may optionally run the following to minimise the errors :-
git clone --depth 1 --single-branch https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
sudo cp /home/$USER/linux-firmware/amdgpu/* /lib/firmware/amdgpu
sudo update-initramfs -u
sudo rm -r /home/$USER/linux-firmware
This shall bring the Ubuntu boot logo only and completely remove boot texts on booting.