Public bug reported: Related links: https://devtalk.nvidia.com/default/topic/876441/linux/monitoring-nvidia-gpu-when-intel-igpu-as-primary-display/
https://devtalk.nvidia.com/default/topic/970144/linux/intel-for-display- nvidia-for-cuda-optimus-bug-/ So the problem is that you can not monitor the temperature with nvidia- smi and also can't set the fan speed if iGPU is as a primary display selected from Prime profiles in Nvidia-Settings. In the second link it is mentioned a workaround that might give a clue about the cause of the problem. That is, I think 'nvidia-smi " should work by default without running this workaround as root. To make it clear, nvidia-smi works as expected if you have selected nvidia gpu as the primary display. Tested with nvidia-361 from official Ubuntu 16.04 repos. Installed libcuda1 and nvidia-prime packages. ==== As additional information regarding the Proprietary GPU Drivers PPA (since it is the only way Ubuntu users can update the drivers with .deb packages): https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa If you install the drivers from the PPA (I tested 370.28 and 367.44) and iGPU as the primary display using PRIME, you can not even able to use CUDA in applications such as Blender/Cycles (CUDA is not available in Blender for GPU compute). This problem (not having CUDA available) does not occur with drivers from official repositories of Ubuntu, for example 361.42 is working well in Kubuntu 16.04. So I do not know if it is because PPA packages are built differently from the official repository. It would be good you to take a look at this. Thanks. System and Hardware specs: i7 3770 - HD 4000 GTX 960 Kubuntu 16.04 64bits $ lspci | grep -i vga 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GM206 [GeForce GTX 960] (rev a1) $ uname -r 4.4.0-38-generic nvidia 361 from official Ubuntu 16.04 repos. Installed libcuda1 and nvidia-prime packages. ** Affects: ubuntu-drivers-common (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1632019 Title: [*buntu 16.04 / PRIME] nvidia-smi not work if iGPU as the primary display To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1632019/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
