diff options
Diffstat (limited to 'resources/libreboot/patch/0020-gm45-fix-uneven-backlight-native-gfx-init.patch')
| -rw-r--r-- | resources/libreboot/patch/0020-gm45-fix-uneven-backlight-native-gfx-init.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/resources/libreboot/patch/0020-gm45-fix-uneven-backlight-native-gfx-init.patch b/resources/libreboot/patch/0020-gm45-fix-uneven-backlight-native-gfx-init.patch new file mode 100644 index 00000000..a2afa531 --- /dev/null +++ b/resources/libreboot/patch/0020-gm45-fix-uneven-backlight-native-gfx-init.patch @@ -0,0 +1,41 @@ +From 512caf2594be34e07383b8a5d5e9e2013c6e2067 Mon Sep 17 00:00:00 2001 +From: Francis Rowe <info@gluglug.org.uk> +Date: Mon, 29 Dec 2014 21:02:48 +0000 +Subject: [PATCH 20/22] gm45: fix uneven backlight (native gfx init) + +When setting brightness levels low, backlight becomes uneven. +This patch fixes that. + +Tested on X200. + +Change-Id: Ie71bf696ba4431ab25076f92dd5fdc9fdc167b09 +Signed-off-by: Francis Rowe <info@gluglug.org.uk> +--- + src/northbridge/intel/gm45/acpi/igd.asl | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/src/northbridge/intel/gm45/acpi/igd.asl b/src/northbridge/intel/gm45/acpi/igd.asl +index 199765b..6f0eb8c 100644 +--- a/src/northbridge/intel/gm45/acpi/igd.asl ++++ b/src/northbridge/intel/gm45/acpi/igd.asl +@@ -206,14 +206,14 @@ Device (GFX0) + + Method (_BCM, 1, NotSerialized) + { +- Store (ShiftLeft (Arg0, 4), ^^BCLV) ++ Store (ShiftLeft (Arg0, 8), ^^BCLV) + Store (0x80000000, ^^CR1) +- Store (0x0610, ^^BCLM) ++ Store (ShiftLeft (0x61, 8), ^^BCLM) + } + Method (_BQC, 0, NotSerialized) + { + Store (^^BCLV, Local0) +- ShiftRight (Local0, 4, Local0) ++ ShiftRight (Local0, 8, Local0) + Return (Local0) + } + +-- +1.9.1 + |