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Shutdown issues with 6.1.66
(bugs.debian.org)
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian provides more than a pure OS: it comes with over 59000 packages, precompiled software bundled up in a nice format for easy installation on your machine.
Could you solve it? The exact same thing happened to me. Although they immediately launched another kernel. But I haven't tried it because I installed pop!_OS If it is already solved, please let me know.