This is a note to let you know that I've just added the patch titled ACPI: video: Fix Lenovo Ideapad Z570 DMI match to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: acpi-video-fix-lenovo-ideapad-z570-dmi-match.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 5da4f8042b69566bef084a2c783a91fef5cc8f73 Author: Hans de Goede <hdegoede@xxxxxxxxxx> Date: Thu Feb 2 13:44:49 2023 +0100 ACPI: video: Fix Lenovo Ideapad Z570 DMI match [ Upstream commit 2d11eae42d52a131f06061015e49dc0f085c5bfc ] Multiple Ideapad Z570 variants need acpi_backlight=native to force native use on these pre Windows 8 machines since acpi_video backlight control does not work here. The original DMI quirk matches on a product_name of "102434U" but other variants may have different product_name-s such as e.g. "1024D9U". Move to checking product_version instead as is more or less standard for Lenovo DMI quirks for similar reasons. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 0ec74ab2a3995..b4f16073ef432 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -300,7 +300,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = { .ident = "Lenovo Ideapad Z570", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), - DMI_MATCH(DMI_PRODUCT_NAME, "102434U"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"), }, }, {