Comment 61 for bug 1794292

Correction:

This is the right order for these steps:
(otherwise just run 'sudo update-initramfs -u' to get the initramfs's modprobe.d dir updated)

"""
Install its DRM module, which should not load by default:

 $ echo 'blacklist cirrus' | sudo tee /etc/modprobe.d/blacklist-cirrus.conf
 $ sudo apt-get -y install linux-modules-extra-$(uname -r)
"""