Same here, today update to last cuda (9.1.85-1) with driver 387.26-1 and don’t work
Kernel:
Linux pop-01 4.13.0-26-generic #29~16.04.2-Ubuntu SMP Tue Jan 9 22:00:44 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
i test in a clean instalation and don’t work. reboot, etc and only have “NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.”
$ sudo apt-get install cuda
Reading package lists… Done
Building dependency tree
Reading state information… Done
cuda is already the newest version (9.1.85-1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ sudo apt-get install cuda-drivers
Reading package lists… Done
Building dependency tree
Reading state information… Done
cuda-drivers is already the newest version (387.26-1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
in a new system or old one the error is the same
$ dpkg -l | grep nvidia
ii nvidia-387 387.26-0ubuntu1 amd64 NVIDIA binary driver - version 387.26
ii nvidia-387-dev 387.26-0ubuntu1 amd64 NVIDIA binary Xorg driver development files
ii nvidia-modprobe 387.26-0ubuntu1 amd64 Load the NVIDIA kernel driver and create device files
ii nvidia-opencl-icd-387 387.26-0ubuntu1 amd64 NVIDIA OpenCL ICD
ii nvidia-prime 0.8.2 amd64 Tools to enable NVIDIA’s Prime
ii nvidia-settings 387.26-0ubuntu1 amd64 Tool for configuring the NVIDIA graphics driver
$ lspci | grep -i nvidia
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
02:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
02:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
03:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
03:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
05:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
05:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
06:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
06:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
07:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
07:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
08:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
08:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
0a:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
0a:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)