Comment 4 for bug 969276

this laptop has a BIOS setting for the display, you can choose for integrated graphics or for discrete graphics (nVidia Quadro 1000M). When I boot the live CD with integrated graphics, the boot process becomes stable.

integrated graphics will disable all external VGA/DVI ports, so its no very useful for me.

So now I'm reinstalling without 3rd party software and try the discrete graphics settings with the nouveau driver.