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Fri, 30 Oct 2026 12:31:37 -0700 (PDT) Received: from munique-a520 ([2804:3bf0:fe29:ac41:2d94:706:4bfd:852e]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-5ec69bb872dsm3671250e0c.6.2026.10.30.12.31.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2026 12:31:37 -0700 (PDT) From: Munique Feitoza To: "Rafael J . Wysocki" , Len Brown Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Munique Feitoza Subject: [PATCH] ACPI: processor: idle: Add DMI quirk for HA0QING A520 Date: Fri, 30 Oct 2026 16:31:28 -0300 Message-ID: <20261030193128.19493-1-muniquefeitoz4@gmail.com> X-Mailer: git-send-email 2.56.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On the HA0QING A520 motherboard paired with AMD Ryzen 5000 series processors (such as the Ryzen 5 5500, Cezanne), entering deep ACPI C-states (C2/C3 mapped to I/O ports 0x414/0x415, corresponding to hardware C6) causes severe system instability, random hard freezes, and memory corruption ('BUG: Bad page state' and list_del corruption in page allocator / LRU paths) during idle transitions. Restrict max_cstate to C1 via processor_power_dmi_table for the HA0QING A520 board to prevent the processor from entering broken deep C-states and ensure system stability. Signed-off-by: Munique Feitoza --- drivers/acpi/processor_idle.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index e113bcbbb..49768b176 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -105,6 +105,10 @@ static const struct dmi_system_id processor_power_dmi_table[] = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), DMI_MATCH(DMI_PRODUCT_NAME,"L8400B series Notebook PC")}, (void *)1}, + { set_max_cstate, "HA0QING A520", { + DMI_MATCH(DMI_BOARD_VENDOR, "HA0QING"), + DMI_MATCH(DMI_BOARD_NAME, "A520") }, + (void *)1}, {}, }; -- 2.56.0