Hello, 1) Nvidia proprietary drivers are not used to build CUDA applications ; 2) Nvcc (Nvidia compiler for CUDA) generates a so called "ptx code" ; 3) It is the job of the Nvidia proprietary drivers to JIT compile the ptx code with respect to the current GPU.
Then, when I installed the nvidia-cuda-toolkit, I was able to build the CUDA application but unable to run the application. So, as already told, I blacklisted the nouveau drivers. Regards, ---- François 2015-08-21 10:16 GMT+02:00 Vincent Cheng <[email protected]>: > On Fri, Aug 21, 2015 at 1:07 AM, Luca Boccassi <[email protected]> > wrote: >> On Aug 21, 2015 08:55, "Vincent Cheng" <[email protected]> wrote: >>> >>> Hi François and Luca, >>> >>> On Sat, Aug 15, 2015 at 4:07 PM, Luca Boccassi <[email protected]> >>> wrote: >>> > On Wed, 2015-08-12 at 13:58 +0200, François Legendre wrote: >>> >> Package: nvidia-cuda-toolkit >>> >> Version: 6.0.37-5 >>> >> Severity: normal >>> >> >>> >> Dear Maintainer, >>> >> >>> >> Many thanks for your work. >>> >> >>> >> I install the nvidia-cuda-toolkit using synaptic. After reboot, the >>> >> Nouveau >>> >> drivers are still loaded. The command >>> >> >>> >> # lsmod | grep nouveau >>> >> >>> >> prints some lines. >>> >> >>> >> I follow the indications found at >>> >> http://docs.nvidia.com/cuda/cuda-getting- >>> >> started-guide-for-linux/#axzz3iaadD0fW for Ubuntu distribution : >>> >> >>> >> 1. Create a file at /etc/modprobe.d/blacklist-nouveau.conf with the >>> >> following >>> >> contents: >>> >> blacklist nouveau >>> >> options nouveau modeset=0 >>> >> 2. Regenerate the kernel initramfs: >>> >> # update-initramfs -u >>> >> >>> >> Now, it works. >>> > >>> > Hello François, >>> > >>> > Thank you for your report. >>> > >>> > I'm not sure we should blacklist nouveau by default in the nvidia-cuda >>> > packages, since they do not depend on the nvidia-driver packages (I >>> > believe Cuda can be used without the latter). It could leave users with >>> > a broken system. >>> >>> AFAIK you need to install the proprietary driver in order to use cuda >>> (but I could be mistaken)? >>> >>> I don't think nvidia-cuda-toolkit should ship its own modprobe.d conf >>> file; the proprietary nvidia driver packages already do, and end users >>> should already have that installed. >> >> Hello, >> >> I agree, I don't think the toolkit should ship a modprobe file. >> >> I thought the drivers were mandatory to run Cuda programs, but not to build >> them. Unless I'm mistaken, the toolkit is used to build. > > Ah, that would make sense...I don't know a thing about how cuda works, > to be honest. > >> If this is not the case, should then the toolkit package depend on the >> drivers? > > That's probably a question that's best answered by either Andreas or > Graham. Thoughts? > > Regards, > Vincent
