Public bug reported:

Relying on the nouveau driver and on the vga switcheroo (to get around a
change in systemd LP: #1777099) caused increased power consumption, and
slowed down the switching process.

Solving the problem in systemd (LP: #1777099), and adding code in gpu-
manager and in nvidia-prime to unload the nvidia modules, and to allow
the PCI device to sleep, dramatically decreases power consumption.

** Affects: nvidia-prime (Ubuntu)
     Importance: High
     Assignee: Alberto Milone (albertomilone)
         Status: In Progress

** Affects: ubuntu-drivers-common (Ubuntu)
     Importance: High
     Assignee: Alberto Milone (albertomilone)
         Status: In Progress

** Affects: nvidia-prime (Ubuntu Bionic)
     Importance: High
     Assignee: Alberto Milone (albertomilone)
         Status: In Progress

** Affects: ubuntu-drivers-common (Ubuntu Bionic)
     Importance: High
     Assignee: Alberto Milone (albertomilone)
         Status: In Progress

** Also affects: nvidia-prime (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: ubuntu-drivers-common (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: nvidia-prime (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: ubuntu-drivers-common (Ubuntu)
       Status: New => In Progress

** Changed in: ubuntu-drivers-common (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: nvidia-prime (Ubuntu Bionic)
     Assignee: (unassigned) => Alberto Milone (albertomilone)

** Changed in: ubuntu-drivers-common (Ubuntu)
     Assignee: (unassigned) => Alberto Milone (albertomilone)

** Changed in: ubuntu-drivers-common (Ubuntu Bionic)
     Assignee: (unassigned) => Alberto Milone (albertomilone)

** Changed in: nvidia-prime (Ubuntu Bionic)
   Importance: Undecided => High

** Changed in: ubuntu-drivers-common (Ubuntu)
   Importance: Undecided => High

** Changed in: ubuntu-drivers-common (Ubuntu Bionic)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1778011

Title:
  PRIME Power Saving mode draws too much power

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