Ubuntu 18.04 and 18.10 Hybrid Laptop Users Invited to Test Nvidia PRIME Support

In Summary :

Ubuntu developer Alberto Milone is calling all hybrid laptop users running either the Ubuntu 18.04 LTS (Bionic Beaver) or the upcoming Ubuntu 18.10 (Cosmic Cuttlefish) operating systems to test Nvidia PRIME support.

With the release of Ubuntu 18.04 LTS (Bionic Beaver) as the first LTS (Long Term Support) Ubuntu release to ship with the GNOME desktop environment by default instead of Canonical's in-house built Unity desktop, hybrid laptop users with Intel and Nvidia GPUs lost the way Nvidia PRIME worked in the Ubuntu 16.04 LTS (Xenial Xerus) series.

But it looks like some Ubuntu developers like Alberto Milone never stopped looking for a fix, and he and his team have successfully released a patch for the bug causing increased power consumption when using the power saving profile with the Nvidia GPU turned off, as well as the inability to switch between power profiles when logging out.  [...]

kindly refer the following link as follow up :
https://news.softpedia.com/news/ubuntu-18-04-and-18-10-hybrid-laptop-users-invited-to-test-nvidia-prime-support-522816.shtml