47 lines
1.6 KiB
Diff
47 lines
1.6 KiB
Diff
From: Jens Reyer <jens.reyer@gmail.com>
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Date: Tue, 17 Feb 2015 19:07:29 +0100
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Subject: ACPI / video: Disable native backlight on Samsung Series 9 laptops
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Origin: https://git.kernel.org/linus/3120d03cf64d7f9fd71231827af2c1550aa4caa7
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Add video_disable_native_backlight quirk for SAMSUNG 900X3C/900X3D/
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900X3E/900X4C/900X4D laptops.
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The native intel backlight controls do not work correctly on SAMSUNG
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Series 9 (900X3C/900X3D/900X3E/900X4C/900X4D) laptops:
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One machine has an completely dimmed (= black) display after boot at the
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GDM login screen and brightness controls work only between 0 and 5%
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(= no effect).
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Another machine has the same brightness control issues if an external
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HDMI monitor is or gets connected, although the initial brightness is
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ok.
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After login to Gnome both machines always work fine.
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Tested on both machines.
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Link: https://bugs.freedesktop.org/show_bug.cgi?id=87286
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Link: https://bugs.debian.org/772440
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Signed-off-by: Jens Reyer <jens.reyer@gmail.com>
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Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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---
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drivers/acpi/video.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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--- a/drivers/acpi/video.c
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+++ b/drivers/acpi/video.c
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@@ -729,6 +729,15 @@ static struct dmi_system_id video_dmi_ta
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DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
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},
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},
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+ {
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+ /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
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+ .callback = video_disable_native_backlight,
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+ .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "900X3C/900X3D/900X3E/900X4C/900X4D"),
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+ },
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+ },
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
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