Ever since I upgraded from 10.2 to 10.3, sometimes the boot process gets stuck after beastie menu, and sometimes not. I didn't have any problems before. If it's in any way relevant, I had originally installed 10.1 (the 1st one to support UEFI boot) on this machine, which then I upgraded to 10.2 and now to 10.3. I've also attached some (hopefully relevant) config files, the message after Beastie and before it hangs up and the output of dmesg.