As far as I can tell the unknown module key isn't a problem, but I get a number
of warnings for it during boot. Is there really a problem here? If there
isn't, can these be suppressed?
Here is an example warning:
Nov 12 00:03:43 bruno kernel: [ 40.835401] Request for unknown module key 'Fedora
kernel signing key: 2f230f4662d4290a932538bd964f802eaa42f49a' err -11