I've just ran into this problem as well. Indeed nvidia_drv.so is missing. Getting the 7184 legacy driver package from http://www.nvidia.com driver archive and manually copying the missing file from there fixed my xorg 7.1.0-18 in sid:
sh NVIDIA-Linux-x86-1.0-7184-pkg1.run -x cp NVIDIA-Linux-x86-1.0-7184-pkg1/usr/X11R6/lib/modules/drivers/nvidia_drv.so /usr/lib/xorg/modules/drivers/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
