I have a similar error to the thread described here:
I do however, have a perfect install, and I run all the post-install tests and everything looks fine, up until I reboot. I’m faced with the login-loop, and from what I read it seems its conflicting with the Xorg system. I banned the nouveau display system (and did a $update-initramfs -u) post-install, and rebooted, and still have the same problem. I’m not really sure what’s going on. Do I have to reinstall a program? I’ve already had to do a fresh install on my system and since this is a new computer cluster, it’s imperative to have CUDA working, but only use the Titan X for GPU processing and not for rendering (rendering will be done by onboard integrated graphics card on motherboard).
Also: $nvidia-smi works fine, but doesn’t show any processes running.
But: $nvidia-settings shows an error message:
ERROR: The control display is undefined; please run ‘nvidia-settings --help’ for usage information.
In this thread I also found that it was a good idea to put ‘no’ in the install OpenGL part of the CUDA driver install. https://devtalk.nvidia.com/default/topic/864024/cuda-setup-and-installation/howto-ubuntu-14-04-intel-igpu-for-display-and-gtx-960-for-cuda/ . Perhaps that is my problem and I should do a new install like in the first link I posted? Any other suggestions? I now recall that by installing CUDA, it asked me if I wanted to install the Nvidia driver too, I believe I said yes. Maybe this was the mistake?
- If I am only installing CUDA for parallel processing with my Titan X, am I still supposed to blacklist the nouveau driver? (It seems as if that is only for display, but I would need it if I’m using an integrated graphics card for that)
- Do I still need to install an Nvidia driver if I am not going to use the drive for visualization? Only installing the CUDA drive makes more sense to me.
I used this guide to perform my install:
Other specs & details:
Linux Kernel version: 3.19.0-25-generic 64-bit machine.
I also don’t happen to have an xorg.conf file
$sudo apt-get install ubuntu-desktop ; outputs ‘ubuntu-desktop is already the newest version’.
$nvcc -V ; seemed to work perfect after install, but it stopped working after reboot.
I login to my system through Ctrl + Alt + F1