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From 4bd254b6971d226759efc9179829fbda3d3be9c5 Mon Sep 17 00:00:00 2001
From: Mike Pagano <mpagano@gentoo.org>
Date: Sun, 10 Jan 2016 12:18:55 -0500
Subject: [PATCH 13/20] 4.4:2700_ThinkPad-30-brightness-control-fix.patch
---
drivers/acpi/blacklist.c | 55 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 2f24b578bcaf..1c7504936e4c 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -312,6 +312,61 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
},
},
+ /*
+ * The following Lenovo models have a broken workaround in the
+ * acpi_video backlight implementation to meet the Windows 8
+ * requirement of 101 backlight levels. Reverting to pre-Win8
+ * behavior fixes the problem.
+ */
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Lenovo ThinkPad L430",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L430"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Lenovo ThinkPad T430s",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430s"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Lenovo ThinkPad T530",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T530"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Lenovo ThinkPad W530",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Lenovo ThinkPad X1 Carbon",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Lenovo ThinkPad X230",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"),
+ },
+ },
+
/*
* BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
* Linux ignores it, except for the machines enumerated below.
|
