I just bought a new HP Envy dv4 5220us laptop with preinstalled Windows 8. The first thing I did was format the HD remove all secure boot/UEFI options in the BIOS and - after a futile attempt at installing Windows 7 - re-installed Windows 8 Professional.
I mainly use Ubuntu (99% of the time) so it is very important for me to get it running on this pc. However, when I try running the installer for 12.10 I get the black screen issue, and if I use the "nomodeset" method, I still don't get to the installation questions. The strange thing is that when I launch the computer now, I get the choice between Windows and Ubuntu, as if it were installed (which it might be?), not in Grub, but in Windows 8, but if I select Ubuntu I go into black screen, or, with "nomodeset", it stalls after a few seconds of script.
I'm very ignorant in all these things, but I'm computer savvy, so I got to all these things by following the forums. However, I don't seem to find anything similar to the problem I'm having.
BTW - I tried to return the pc today, but because of some stupid fine print I can't, so I'M STUCK WITH IT, so I really want this to work.