Hi
The native intel backlight controls do not work correctly on SAMSUNG
900X3C/900X3D/900X3E/900X4C/900X4D laptops as I reported in
https://bugs.freedesktop.org/show_bug.cgi?id=87286 (and
https://bugs.debian.org/772440).
Aaron Lu told me there to speak up here/to Rafael.
Please find attached a patch to disable the native backlight on this
laptop model, like it was already done for some other older models.
I assume this would be the proper commit comments (or should it be
signed-off?):
Bug-Link: https://bugs.freedesktop.org/show_bug.cgi?id=87286.
Reported-and-tested-by: Jens Reyer <jens.reyer@xxxxxxxxx>
The patch applies to
https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
branch linux-next, head at
389a8d43d64711b0e7282d227e05a6a71b43753d
Rafael J. Wysocki 2015-02-12 22:43:26
I verified the issues are still present in linux-next and get solved
with this patch.
Just tell me if there is anything else I can do to get this applied.
Thanks
Jens Reyer/jre <jre.winesim@xxxxxxxxx>
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 88a4f99..debd309 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -540,6 +540,15 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
},
},
+ {
+ /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
+ .callback = video_disable_native_backlight,
+ .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "900X3C/900X3D/900X3E/900X4C/900X4D"),
+ },
+ },
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
