Re: [BUG] ASUS ProArt PX13 HN7306WU: amd_pmc s2idle S0ix corrupts AMD 1022:150b root port, NVIDIA dGPU returns header type 7f

[Mario Limonciello <mario.limonciello@amd.com>]

On 4/3/26 3:47 PM, Joyful Lee wrote:
> On Fri, Apr 3, 2026 at 4:03 PM Mario Limonciello
> <mario.limonciello@amd.com> wrote:
>> Can you do the exact same on the same branch/commit but without pciehp
>> enabled?  It will make comparison of all the impacts (not just this root
>> port) a lot easier.
> 
> Here you go. Unfortunately it's not *exactly* the same because I had to
> disable the nvidia driver to get a result.

Thanks - the most obvious observation is what you already noted - 
without hotplug support the root port skips PM all together.

[24.575705] pcieport 0000:00:01.2: PCI PM: Suspend power state: D0
[24.575707] pcieport 0000:00:01.2: PCI PM: Skipped
[24.575709] pcieport 0000:00:01.1: PCI PM: Suspend power state: D0
[24.575709] pcieport 0000:00:01.1: PCI PM: Skipped

vs

[29.279987] pcieport 0000:00:01.1: power state changed by ACPI to D3cold
[29.279991] pcieport 0000:00:01.1: PCI PM: Suspend power state: D3cold
[29.280214] pcieport 0000:00:01.2: power state changed by ACPI to D3cold
[29.280219] pcieport 0000:00:01.2: PCI PM: Suspend power state: D3cold

The hotplug support seems to apply to 3 ports.

   0000:00:01.1 (Bus 01):
   - Slot Capabilities: 0x00040060
   - Flags: HotPlug+ Surprise+ LLActRep+

   0000:00:01.2 (Bus 61):
   - Slot Capabilities: 0x00040060
   - Flags: HotPlug+ Surprise+ LLActRep+

   0000:00:03.1 (Bus c4):
   - Slot Capabilities: 0x000425e0
   - Flags: HotPlug+ Surprise+ LLActRep+
   - This port also has bandwidth control enabled: bwctrl: enabled with 
IRQ 38

The port stays in D0 because the child (the GPU) stays in D0 for suspend.

   [24.599889] pcieport 0000:00:03.1: PCI PM: Suspend power state: D0 
  
  

   [24.599890] pcieport 0000:00:03.1: PCI PM: Skipped

So I would say we should look at what the GPU isn't going to D3 for 
suspend for the next clue.