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Edit : IT IS "FIXED" BY THE NEW UPDATES. Thank You Devs ❤️
(files.mastodon.social)
Till you figure out a solution or root cause of this issue, for the time being you may disable Secure Boot in BIOS to avoid this issue.
I have only Ubuntu, I had to disable SecureBoot anyway to keep the NVIDIA drivers from giving me a black screen with a blinking cursor after a RAM upgrade.
Linux for Human Beings.
Ubuntu is a popular Linux operating system for PC / mobile devices, etc.
Developed by Canonical & based on Debian (another older Linux OS) which is known for it's rock solid stability.
Ubuntu is trusted everywhere computing by professionals and common users alike.