Out of curiousity, does using blob pgraph fw help with this issue? You can extract it yourself by using the instructions at http://nouveau.freedesktop.org/wiki/NVC0_Firmware/ or you can try using my script (https://raw2.github.com/imirkin/re-vp2/master/extract_firmware.py) with the 325.15 blob, although I'm not _100%_ sure that it produces the correct graph fw for nvd9; that's a very recently-added feature. Note that you'll need to add nouveau.config=NvGrUseFW=1 to your kernel cmdline, and make sure that the fw is reachable when the nouveau module loads.