So, I thought I'd upgrade from DP5 to DP6 today. As the previous DP upgrades never posed a problem, I wasn't too worried about this one either. I chose to install it, and it asked me to reboot, and I clicked OK. Here's where the odd stuff happened. The screen went black and it didn't reboot, nor did it do anything else (start installer or similar). Just to be sure it wasn't actually installing even though the monitor was black, I let it sit like that for maybe 30 mins. Nothing happened so I rebooted.
After that, I can't boot anymore. The boot hangs just after the boot args are displayed in the verbose. Looks like this:
(pardon the low quality shot, only had mobile phone in dimly lit room).
Tried most things, like safe mode, some different FakeSMC:s, tried all possible gpu settings, and so on. Always the same thing. Anyone got any suggestion what might be wrong? I do have TimeMachine backups, but no bootable USB to restore it from, so even though I can probably solve it through backups, it's a bit of a hassle.. Any ideas on how to get it to boot appreciated.
EDIT: Just noticed this might fit better in the "post installation" forum, but seems I can't move or delete it. Moderators, feel free to move the thread if needed.