I am installing Lubuntu on the power mac in my sig, but after the loading passes it black screens and freezes. What would cause this. My mac osx on the 500Gig drive shows a no/prohibited sign when booting, what would cause this? Is it a kernel panic? Can mac osx and lubuntu share the SSD? More info: 1 TB drive connected to motherboard, sata 1 mode, powered by mac. 500 GB drive connected to motherboard, sata 1 mode, powered by mac. SSD: Connected to SATA card, sata 3 mode, powered by an AMD pc that is next to the mac.