** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

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https://bugs.launchpad.net/bugs/1793338

Title:
  Fix unusable NVIDIA GPU after S3

Status in HWE Next:
  New
Status in OEM Priority Project:
  Confirmed
Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Committed
Status in linux-oem source package in Bionic:
  Fix Released
Status in linux source package in Cosmic:
  Fix Released
Status in linux-oem source package in Cosmic:
  Fix Released

Bug description:
  [Impact]
  NVIDIA GPU becomes unusable after S3.

  [Test]
  The NVIDIA GPU works well after applying this patch.

  [Fix]
  Rewrite 0 to Intel PCI bridge 'Prefetchable Base Upper 32 Bits'.
  This should be done by BIOS S3 code [1], but now the issue reappears, let's
  do the same via Linux PCI subsystem.

  [Regression Potential]
  Low.
  After applying this patch I haven't noticed any change on already
  working PCI devices.
  Also this patch is acked by PCI and ACPI maintainers, so we can be more
  confident. 

  [1] https://bugzilla.kernel.org/show_bug.cgi?id=116851#c23

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