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

[Marco Scardovi <mscardovi95@gmail.com>]

On 12/18/25 11:38, Mika Westerberg wrote:
> On Thu, Dec 18, 2025 at 11:33:14AM +0100, Hans de Goede wrote:
>> Hi,
>>
>> On 18-Dec-25 07:39, Mika Westerberg wrote:
>>> On Wed, Dec 17, 2025 at 07:19:56PM +0000, Francesco Lauritano wrote:
>>>> On Wednesday, December 17th, 2025 at 7:01 PM, Mario Limonciello <superm1@kernel.org> wrote:
>>>>
>>>>> 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?
>>>> dmesg without the workaround:
>>>> [    1.005184] pci 0000:01:00.0: PME# supported from D0 D3hot
>>>> [    1.288811] pci 0000:01:00.0: vgaarb: VGA device added
>>>> [   38.250139] nvidia: loading out-of-tree module taints kernel.
>>>> [   38.369358] nvidia 0000:01:00.0: enabling device (0000 -> 0003)
>>>> [   39.744421] NVRM: GPS ACPI DSM called before _acpiDsmSupportedFuncCacheInit
>>>>
>>>> GPU is in D0 from 1.0s. nvidia loads at 38.2s after the GPIO hang completes.
>>>>
>>>> No weird tools/APIs besides userspace utils (asusctl/supergfxctl).
>>>>
>>>> No changes to BIOS factory defaults other than disabling Fast Boot.
>>>> dGPU is active, Display Mode is Dynamic (hybrid).
>>>>
>>>> Traced RDNT - it's set by GPS function 19 in the ACPI tables:
>>>> Case (0x13)
>>>> {
>>>>      Debug = "GPS fun 19"
>>>>      \_SB.PCI0.SBRG.RDNT = (Local1 + 0xD1)
>>>> }
>>>>
>>>> As far as I can understand GPIO initcall blocks at late_initcall_sync, preventing nvidia
>>>> from loading in time to respond. Based on the timing, GPU is awake but nothing can
>>>> register a handler while kernel is stuck at NOD2 polling loop.
>>> I wonder if you could try with the nouveau driver so that it's built-in to
>>> the kernel proper? Then it should be ready at the time these events
>>> trigger.
>> That is not really a workable solution though.
> Yeah, I did not meant it to be the "solution" rather just to check whether
> it is related if the GPU driver is there or not. You cannot build the
> proprietary driver into the kernel so that's why I suggested the
> open-source one.

Hi Everyone,

I would start saying sorry for the necrobump. I faced the same problem 
on my G614PR and fixed the same way as Francesco.

Do you happen to know if there is any news about this? I'm currently on 
CachyOS with kernel 7.0 and noticed it behaves the same way as 6.19.

I'm on to try patches or provide more infos if needed, even if I have to 
admit I know Linux but not that deeply.