** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: Incomplete
** Changed in: linux (Ubuntu Cosmic)
Status: Incomplete => Fix Committed
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https://bugs.launchpad.net/bugs/1793338
Title:
Fix unusable NVIDIA GPU after S3
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Bionic:
New
Status in linux source package in Cosmic:
Fix Committed
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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