Comment 2 for bug 787071

The integrated card does not work regardless of nouveau.noaccel=1 or OSX's graphics card selection. The discrete card only works when nouveau.noaccel=1 and OSX has the discrete card selected.

(In any of these situations that cause a crash, if "quiet splash" is present, the kernel locks up. Otherwise, the computer continues to boot and GDM will actually load up, but the display will remain corrupted. I think this might be another bug or a side effect of this bug, so I vote to ignore this for now.)