Re: [PATCH] gpiolib: acpi: Add ignore_wake quirk for ASUS ZenBook UX425UA_UM425UA

Hi Mario,

Nothing is physically connected to GPP3. The bridge (00:02.1 /
\_SB.PCI0.GPP3) is unpopulated on this board (the ZenBook UX425UA has
no Ethernet or secondary PCIe devices there).

The DSDT seems to have leftover definitions for RTL8/RUSB on GPP3 from
a shared BIOS base, and routes GPIO pin 24 to it in _EVT, causing
phantom wake events during s2idle.

Here is the acpidump:
https://gist.github.com/vaknin/142f5cbad15958e9025cd81960114f6e

Thanks,
Kivan


On Fri, Aug 21, 2026 at 11:49 PM Mario Limonciello
<[email protected]> wrote:
>
> What is connected to this GPP3?
>
> Can you please share your acpidump somewhere?
>
> On 8/21/26 02:06, Kivan wrote:
> > The ASUS ZenBook UX425UA_UM425UA (with AMD Ryzen 7 5700U SoC) fails
> > to stay suspended in s2idle (Modern Standby), prematurely waking
> > after 1-3 seconds with 0% hardware sleep achieved.
> >
> > In the laptop's ACPI SSDT tables (SSDT15), GPIO Pin 24 (hex 0x18) is
> > defined in _AEI as ExclusiveAndWake targeting the PCIe bridge device
> > \_SB.PCI0.GPP3:
> >
> >      GpioInt (Edge, ActiveLow, ExclusiveAndWake, PullNone, 0x0000,
> >               "\\_SB.GPIO", ...) { 0x0018 }
> >
> > When the SoC powers down PCIe root ports into low-power states during
> > s2idle, an electrical edge transition triggers a spurious wake interrupt
> > on GPIO Pin 24. This signals the AMD GPIO controller (AMDI0030:00 / IRQ 7
> > via pinctrl_amd), aborting sleep across the system.
> >
> > Booting with kernel parameter "gpiolib_acpi.ignore_wake=AMDI0030:00@24"
> > completely resolves the issue: amd_gpio reports ignoring the wakeup on
> > pin 24, and interrupt counts in /proc/interrupts remain at 0 during sleep
> > cycles, allowing uninterrupted s2idle until intentionally woken by the
> > user.
> >
> > Add a DMI quirk entry to ignore wake events on AMDI0030:00@24 for this
> > system.
> >
> > Signed-off-by: Kivan <[email protected]>
> > ---
> >   drivers/gpio/gpiolib-acpi-quirks.c | 13 +++++++++++++
> >   1 file changed, 13 insertions(+)
> >
> > diff --git a/drivers/gpio/gpiolib-acpi-quirks.c b/drivers/gpio/gpiolib-acpi-quirks.c
> > index a0116f0..dd4db58 100644
> > --- a/drivers/gpio/gpiolib-acpi-quirks.c
> > +++ b/drivers/gpio/gpiolib-acpi-quirks.c
> > @@ -392,6 +392,19 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
> >                       .ignore_wake = "VEN_0488:00@355",
> >               },
> >       },
> > +     {
> > +             /*
> > +              * Spurious wakeups from GPP3 PCIe bridge interrupt
> > +              * Found in BIOS UX425UA.301
> > +              */
> > +             .matches = {
> > +                     DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> > +                     DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX425UA_UM425UA"),
> > +             },
> > +             .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
> > +                     .ignore_wake = "AMDI0030:00@24",
> > +             },
> > +     },
> >       {} /* Terminating entry */
> >   };
> >
>