Hi,
currently when my laptop resumes from hibernation, I see the vendor logo and after that a notification message pops up beginning with “reported hibernation image… uuid=…” and I’m wondering if it’s possible to turn this notification off.
I’ve already followed the steps on ArchWiki Silent Boot to remove all other messages during boot.
Thanks for reading.
I don’t have an answer to that query, however:
I’m guessing that the same mechanism that presents general warnings will also advise you of any related errors that might be critical to maintaining your system health. Turn it off somehow, and you might never know if there is a serious issue.
I like to see messages during boot for the same reason.
But, hey, it’s your machine. 
Good luck.
Pretty much what I was going to say. That message in particular is useful to confirm hibernation should be working.