** Description changed:

  [Impact]
- With AMDGPU and don't use it as a display output,
- After multiple Suspend&reume, system would hang.
+ With AMD-GPU and don't use it as a display output,
+ After multiple Suspend&resume, system would hang.
  
  [Fix]
  Disable BACO for polaris12 series.
+ BACO allow the graphics cards on Linux to support S4 / hibernation support. 
  
  [Test Case]
  1. Must plug AMD GPU and don't use it as display output
- 2. Plug DP/hdmi on igpu.
+ 2. Plug DP/HDMI on iGPU.
  3. Suspend&resume machine.
  4. check if system hangs.
  
  [Where problems could occur]
  Disable BACO would cause higher power consumption.

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https://bugs.launchpad.net/bugs/1940204

Title:
  AMDGPU: Fix System hang after resume from suspend

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