Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: ubuntu-drivers-common (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1632019
Title:
[*buntu 16.04 / PRIME] nvidia-smi not work if iGPU as the primary
display
Status in ubuntu-drivers-common package in Ubuntu:
Confirmed
Bug description:
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.
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