This is a note to let you know that I've just added the patch titled
ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470
to the 4.19-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-add-backlight-native-dmi-quirk-for-lenovo.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8fa7eefcf4ba97402dff41db1933b4382448ecf6
Author: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
Date: Tue Apr 18 08:42:00 2023 +0200
ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470
[ Upstream commit 96b709be183c56293933ef45b8b75f8af268c6de ]
The Lenovo Ideapad Z470 predates Windows 8, so it defaults to using
acpi_video for backlight control. But this is not functional on this
model.
Add a DMI quirk to use the native backlight interface which works.
Link: https://bugzilla.suse.com/show_bug.cgi?id=1208724
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
Reviewed-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 b4f16073ef432..866bc20c82397 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -294,6 +294,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
},
},
+ {
+ /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */
+ .callback = video_detect_force_native,
+ /* Lenovo Ideapad Z470 */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"),
+ },
+ },
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
.callback = video_detect_force_native,
