My NV96 does not resume from suspend to ram (the screen stays black, magic sysrq keys do work) with the current linus git kernel, i bisected it to the following commit.
drm/nv50/fifo: prevent races between clients updating playlists b5096566f6e1ee2b88324772f020ae9bc0cfa9a0
It's not obvious to me how this causes problems, but reverting this commit does solve my problem.