This was running. I’ve got two M2090’s in an R720, running CentOS 6.5 I just updated the system, and the GPUs are inaccessible. enum_gpu, which we use to wake them up, fails, presumably having found 0, as does my user’s program.
As a last resort, I yum removed kmod-nvidia and d/l the proprietary package from NVidia, NVIDIA-Linux-x86_64-325.15.run. It seems to build fine, I reboot, and lsmod shows it in, while modinfo tells me that it looks like what I just built. /dev/nvidia* are there, and all are a+w,a+r… but no joy.
Clues for the poor?