I just upgraded Ubuntu from 20.04 to 22.04 but I can't boot Ubuntu. It shows this error
ACPI Error: Needed [Integer/String/Buffer], found [Package]
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2Does this answer your question? ACPI Error during boot but does not cause system failure - How to fix it? – graham Aug 04 '23 at 17:28
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It may help if you're specific with details; 20.x isn't a valid release, and even if you mean 20.04 you didn't weren't specific as to product (Server, Desktop, flavor etc) thus we've few clear details as to what you're actually using/asking about, nor kernel stack involved (Server & Desktop have different defaults; flavors can use either depending on installation media; alas you gave no details*). Specifics allow us to be more specific in suggestions/answers. – guiverc Aug 05 '23 at 01:00