I have a computer running an intel CPU (with hd graphics) and a nvidia geforce display card.
Since I just need the GPU for CUDA/OpenCL computation, I want to config the computer to use intel hd graphics instead to save video memory. Therefore, I try to switch back the primary display adapter from nvidia to intel hd graphics in BIOS.
However, if I switch to use intel hd graphics in my BIOS, /dev/nvidia0, /dev/nvidiactl and even some command like nvidia-smi will be disappear. When I run
$ lsmod | grep nvidia nvidia 9430169 0
I can see nvidia module is loaded.
If I switch back the use nvidia in BIOS, /dev/nvidia0, /dev/nvidiactl and nvidia-smi command appear again.
How can I solve it?
I am running
$ uname -a Linux xxxxx 3.8.0-32-generic #47~precise1-Ubuntu SMP Wed Oct 2 16:19:35 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04.3 LTS"
nvidia driver 319.37 from developer.nvidia.com ubuntu package directly (here)