On Tue, 25 Jul 2023 10:06:44 +0200 Igor Mammedov <imammedo@xxxxxxxxxx> wrote: > PS: > What happens is that on resume firmware (likely EC), > issues ACPI bus check on root ports which (bus check) is > wired to acpiphp module (though pciehp module was initialized > at boot to manage root ports), it's likely firmware bug. > > I'd guess the intent behind this was to check if PCIe devices > were hotplugged while laptop has been asleep, and for > some reason they didn't use native PCIe hotplug to handle that. > However looking at laptop specs you can't hotplug PCIe > devices via external ports. Given how old laptop is > it isn't going to be fixed, so we would need a workaround > or fixup DSDT to skip buscheck. > > The options I see is to keep old kernel as for such case, > or bail out early from bus check/enable_slot since root port > is managed by pciehp module (and let it handle hotplug). scratch all of above out (it's wrong). Looking at DSDT firmware sends Notify(rpxx, 2 /* Wake */) event. Which according to spec needs to be handed down to the native device driver.
