Personally I was not aware of “nvidia-firmware-installer” until @malcolmlewis mentioned it.
I also use nvidia cards, and on machines using nouveau, don’t have the proprietary firmware installed. Checking through the journal I also found the same “error” message for direct firmware load failure.
Further investigation led me, eventually, to: nouveau.freedesktop.org/VideoAcceleration.html
At installation a message of some sort would probably be beneficial to alert users…
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