When I boot the machine with Celena a large black square occupies about one quarter of the screen with an error message: err 8. The black square & the error message disappears after I press the enter key twice, then the grub menu is presented and everything works fine. (I reinstalled again to see if that might correct the problem. Same issue.)
I reloaded Cassandra from one of my drive images.
Anybody suggest a possible fix so I can use Celena without the boot error?





