Ubuntu
nvidia-graphics-drivers-390 package

  1. Bug #1752739
  2. Comment #13

Comment 13 for bug 1752739

Revision history for this message
Doug McMahon (mc3man) wrote : Re: [Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

On 03/15/2018 04:24 PM, Kirill Romanov wrote:
> Still doesn't work for me.
>
 Bug reports are poor place for troubleshooting, particularly when bug is
fix released.
If inclined post in this thread at UF, provide
1. how are you trying to enable
2. your gpu info , inxi -G will suffice

post 32 shows kernel option, post 37 show using modprobe.d method, if
you have a GeForce mobile nvidia card  you may need lightdm .
https://ubuntuforums.org/showthread.php?t=2385770&p=13748601&viewfull=1#post13748601