Re: [BUG] 36-second boot delay due to by acpi_gpio_handle_deferred_request_irqs on ASUS ROG Strix G16 (2025)

[Mario Limonciello <superm1@kernel.org>]

On 12/17/25 10:57 AM, Francesco Lauritano wrote:
> On Wednesday, December 17th, 2025 at 4:12 PM, Francesco Lauritano <francesco.lauritano1@protonmail.com> wrote:
> 
>> The _AEI defines 5 GPIO interrupts. Narrowed it down to two:
>>
>> gpiolib_acpi.ignore_interrupt=AMDI0030:00@21,AMDI0030:00@24
>>
>> This fixes the delay. Pins 0x15 and 0x18 both call: \_SB.PCI0.SBRG.HNC0()
> 
> Traced it further. HNC0(pin, 0) takes the Else branch and calls:
> ATKM(0xC0)
> ADTM(Zero)
> 
> ADTM calls NOD2(), which is the actual culprit:
> 
> While ((Arg0 != RDNT))
> {
>      If ((Local0 >= 0x0F)) { Break }
>      Notify (^^GPP0.PEGP, Arg0)
>      Local0++
>      Sleep (Local0 * 0x64)
> }
> 
> It notifies the dGPU and polls RDNT, sleeping 100, 200, ... 1500ms per iteration.
> Max 15 loops = ~12s per pin. GPU doesn't respond at boot so it maxes out.
> 
> Two pins, ~12s each, ~24-36s total.
> 
> Francesco

Any idea why isn't the dGPU responding?  I would have expected 
https://git.kernel.org/torvalds/c/4d4c10f763d78 sets up policy that it's 
in D0.

Is the dGPU turned off in BIOS or through some reverse engineered 
tool/API or something?