[Bug 1975804] Re: [SRU][OEM-5.14/OEM-5.17/J][PATCH 0/2] Fix system hangs after s2idle on AMD A+A GPU

This bug is awaiting verification that the linux/5.15.0-36.37 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-jammy' to 'verification-done-jammy'. If the problem
still exists, change the tag 'verification-needed-jammy' to
'verification-failed-jammy'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-jammy

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https://bugs.launchpad.net/bugs/1975804

Title:
[SRU][OEM-5.14/OEM-5.17/J][PATCH 0/2] Fix system hangs after s2idle on
AMD A+A GPU

Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.14 package in Ubuntu:
New
Status in linux-oem-5.17 package in Ubuntu:
New
Status in linux-oem-5.14 source package in Focal:
New
Status in linux source package in Jammy:
Fix Committed
Status in linux-oem-5.17 source package in Jammy:
New

Bug description:
[Impact]
System may hang after s2idle on AMD A+A GPU config due to the following
commits:
8b328c64c7082278c888927f00e526786eec2880 ("drm/amdgpu: don't use BACO
for reset in S3") https://bugs.launchpad.net/bugs/1968475
a26d80ba0d9e67ea11cbfc25618320163497d3fe ("drm/amd/pm: keep the BACO
feature enabled for suspend") https://bugs.launchpad.net/bugs/1958371

[Fix]
Revert one commit and don't reset dGPU when s2idle

[Test]
Verified on AMD RMB, stress s2idle passed.

[Where problems could occur]
Low risk, it may break s2idle on AMD platform.

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