From: sashiko-bot@kernel.org
To: "Krittikun Wongnin" <krittikunwongnin@gmail.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] ACPI: PM: Add Acer Aspire A515-53G to dmi_leave_unused_power_resources_on
Date: Tue, 13 Oct 2026 07:45:11 +0000 [thread overview]
Message-ID: <sashiko-outbox-169205@kernel.org> (raw)
In-Reply-To: <20261013074245.4327-1-krittikunwongnin@gmail.com>
> On the Acer Aspire A515-53G (Whiskey Lake + NVIDIA GeForce MX230), the
> dGPU behind root port RP05 (00:1c.4) falls off the bus during boot and
> is unusable until the next power cycle:
>
> nvidia 0000:02:00.0: Unable to change power state from D3cold to D0, device inaccessible
> NVRM: The NVIDIA GPU 0000:02:00.0 ... has fallen off the bus
>
> The firmware ships two SSDTs which both provide power management for
> the dGPU:
>
> - One SSDT defines \_SB.PCI0.RP05.PC01 together with
> RP05._PR0/_PR2/_PR3 = { PC01 }.
>
> - A second SSDT defines \_SB.PCI0.RP05.PCRP (_STA initially One,
> _OFF calls \_SB.PCI0.HGOF, which puts the link into L2/L3 and drops
> [ ... ]
> bound and power/control set to auto, RP05 reaches D3cold and the GPU
> comes back to D0 on resume.
>
> Link: https://lore.kernel.org/r/CADS-TgDQ1G8vrTQLJeQ3RTBVFTyMe0C+5p2=UBKS=EFCDFuaxw@mail.gmail.com/
> Signed-off-by: Krittikun Wongnin <krittikunwongnin@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261013074245.4327-1-krittikunwongnin@gmail.com?part=1
prev parent reply other threads:[~2026-10-13 7:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-13 7:42 [PATCH] ACPI: PM: Add Acer Aspire A515-53G to dmi_leave_unused_power_resources_on Krittikun Wongnin
2026-10-13 7:45 ` sashiko-bot [this message]
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