Description of problem:

I got all the time the annoying error message above. I saw at the errata that the default grub2 append line is not written to disk to after boot, that means especially no "splash quiet" kernel option. Writing these options into /etc/default/grub made the kernel messages fortunately invisible and so these messages don't annoy so much any more ;-) 
Fortunately these had beyond until now no negative effects. But nevertheless I wanted to report these curious messages. 


Version-Release number of selected component (if applicable):
every kernel

How reproducible:
Every 1-2 seconds the message appear on my Toshiba Laptop if you execute for example "journalctl -f"