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 2:10 PM, Bjorn Helgaas wrote:
> On Fri, Apr 03, 2026 at 01:41:04PM -0500, Mario Limonciello wrote:
>> On 4/3/26 1:04 PM, Bjorn Helgaas wrote:
>> ...
> 
>>> But as you point out, it doesn't close the issue.  Somebody else is
>>> going to trip over the same issue.  Most likely they will not report
>>> it and have no idea how to fix it.  Even if they do report it, we'll
>>> have to go through this whole debug process again.
>>>
>>> The kernel should work correctly (possibly with increased power
>>> consumption or some other non-functional issue) regardless of whether
>>> CONFIG_HOTPLUG_PCI_PCIE is enabled.
>>
>> I do hope as part of this we can reconsider why CONFIG_HOTPLUG_PCI_PCIE
>> isn't part of the defconfig in the first place.
>>
>> defconfig doesn't work on any hardware of mine by default and it's too much
>> work to figure out what to add to it.  So I always start at distro configs
>> and peel back for my own use.
>>
>> But, if we could actually make defconfig *usable* for general purpose kernel
>> users maybe more people would use it.
>>
>>> How can we make Linux smart enough that if we're lacking pciehp or
>>> whatever is necessary, we automatically avoid s2idle or S0ix or
>>> whatever causes this problem?
>>
>> I suppose we /could/ have CONFIG_AMD_PMC depend on CONFIG_HOTPLUG_PCI_PCIE
>> but it feels like using super glue on a wound until we know why this
>> happens.
> 
> IMO making CONFIG_HOTPLUG_PCI_PCIE part of defconfig is definitely not
> a solution.  It just makes it slightly less likely that people will
> hit this.
> 
> Making CONFIG_AMD_PMC depend on CONFIG_HOTPLUG_PCI_PCIE might be a
> little better, but I agree that it's pretty janky to do that without
> understanding the mechanism.  Seems like we have a good chance to
> understand this better, so I'm not ready to paper over it yet.

To be clear (since my super glue comment wasn't), I don't think we 
should yet either.  I'm just suggesting that if we do eventually decide 
to those are the best options I could come up with.