From: Zhai Can <bczhc0@126.com>
Date: Sat, 14 Feb 2026 16:14:52 +0000 (+0800)
Subject: ACPI: PM: Add unused power resource quirk for THUNDEROBOT ZERO
X-Git-Tag: ceph-for-7.0-rc4~154^2~1^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=cd7ef20ba8c6e936dba133b4136537a8ada22976;p=ceph-client.git

ACPI: PM: Add unused power resource quirk for THUNDEROBOT ZERO

On the THUNDEROBOT ZERO laptop, the second NVMe slot and the discrete
NVIDIA GPU are both controlled by power-resource PXP. Due to the SSDT table
bug (lack of reference), PXP will be shut dow as an "unused" power resource
during initialization, making the NVMe slot #2 + NVIDIA both inaccessible.

This issue was introduced by commit a1224f34d72a ("ACPI: PM: Check
states of power resources during initialization"). Here are test
results on the three consecutive commits:

(bad again!) a1224f34d72a ACPI: PM: Check states of power resources during initialization
(good) bc2836859643 ACPI: PM: Do not turn off power resources in unknown state
(bad) 519d81956ee2 Linux 5.15-rc6

On commit bc2836859643 ("ACPI: PM: Do not turn off power resources in
unknown state") this was not an issue because the power resource state
left UNKNOWN thus being ignored.

See also commit 9b04d99788cf ("ACPI: PM: Do not turn of unused power
resources on the Toshiba Click Mini") which is another almost identical
case to this one.

Fixes: a1224f34d72a ("ACPI: PM: Check states of power resources during initialization")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221087
Signed-off-by: Zhai Can <bczhc0@126.com>
Link: https://patch.msgid.link/20260214161452.2849346-1-bczhc0@126.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 361a7721a6a8..7da5ae5594a7 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -1113,6 +1113,19 @@ static const struct dmi_system_id dmi_leave_unused_power_resources_on[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE Click Mini L9W-B"),
 		},
 	},
+	{
+		/*
+		 * THUNDEROBOT ZERO laptop: Due to its SSDT table bug, power
+		 * resource 'PXP' will be shut down on initialization, making
+		 * the NVMe #2 and the NVIDIA dGPU both unavailable (they're
+		 * both controlled by 'PXP').
+		 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "THUNDEROBOT"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "ZERO"),
+		}
+
+	},
 	{}
 };