So I recently did a fresh install of 12.10 in my Acer Aspire 4736z, which has Intel GMA4500 chipsets.
I had to set 'nomodeset' in the installation part to get through the installation itself, otherwise I would also get stuck with a black screen.
It ran smoothly, no problems whatsoever after setting that mode.
And then when I tried to boot ubuntu for the first time, the same thing happened right after boot. The screen would turn black with no backlight on whatsoever. But sounds could be heard no problem.
Searching on google for solutions, I was unable to fix it.
However,I tried plugging an external monitor to the laptop, via VGA, and it worked well. I could, and still can, see the OS running perfectly through the monitor but not through the laptop screen. Still, even if I unplug the monitor, the laptop screen will not display Ubuntu.
I would like to have my laptop screen display the OS at once and any help is appreciated. Thanks. (: