** Changed in: hwe-next
       Status: Triaged => Fix Released

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  Nvidia fails after switching its mode

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  Switch Nvidia mode requires rebooting the system. It's because of losing some 
of its status while switching mode if runtime PM is enabled. It's a generic 
issue that would happen on some other devices, too. This patch restores 
devices' config space on runtime resume.

  Test and verify it on machines with Nvidia discrete graphics.

  Fix by saving and restoring config space over a runtime suspend cycle even if 
the device is not bound.

  [Regression Potential]
  Low. It saves and restores states during suspending and resuming.

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