Public bug reported:
[Impact]
With WX3200 and 20.04d kernel the unit freezes on resume
[Fix]
commit 0064b0ce85bb ("drm/amd/pm: enable ASPM by default") enabled ASPM
by default but a variety of hardware configurations it turns out that this
caused a regression.
* PPC64LE hardware does not support ASPM at a hardware level.
CONFIG_PCIEASPM is often disabled on these architectures.
* Some dGPUs on ALD platforms don't work with ASPM enabled and PCIe
subsystem disables it
Check with the PCIe subsystem to see that ASPM has been enabled
or not.
[Test Case]
1. plug wx3200 on the adl machine and make it as a output.
2. suspend&resume machine
3. check if machine could resume successfully
[Where problems could occur]
Low, just disable AMDGPU ASPM if system doesn't enable it.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-5.14 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => koba (kobako)
** Changed in: linux (Ubuntu Jammy)
Status: New => In Progress
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Status: New => In Progress
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Assignee: (unassigned) => koba (kobako)
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https://bugs.launchpad.net/bugs/1961855
Title:
Fix With 20.04d kernel and WX3200, unit freezes on resume
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