[Bug 1946434] Re: SRU: enable RTD3 only on laptops and decouple on-demand with RTD3

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https://bugs.launchpad.net/bugs/1946434

Title:
  SRU: enable RTD3 only on laptops and decouple on-demand with RTD3

Status in OEM Priority Project:
  New
Status in nvidia-prime package in Ubuntu:
  New

Bug description:
  [Impact]

   * User can't use GPU for other purpose (eg: deep-learning) if RTD3 is not supported
   * According to Nvidia README, the RTD3 doesn't support on non-laptop machine

  [Test Plan]

   * With Nvidia driver installed
   * On non-laptop machine. Can set GPU mode to on-demand
   * On laptop with GPU in runtime PM support list. Set GPU mode to on-demand and Nvidia driver is loaded with "NVreg_DynamicPowerManagement=0x02"

  [Where problems could occur]

   * With GPU supported RTD3 not able enable runtime PM on non-laptop.
  But based on the Nvidia README, this case shall not happened.

  [Other Info]

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