From 152a4e630f7ffdd7ff64427c4ba488dc0bce76af Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Mon, 22 Jun 2009 11:31:18 +0800
Subject: ACPI: video: DMI workaround broken Acer 7720 BIOS enabling display
 brightness

http://bugzilla.kernel.org/show_bug.cgi?id=13121

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/video.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 1bdfb37377e3..1eff1625672a 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -586,6 +586,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
 		},
 	},
+	{
+	 .callback = video_set_bqc_offset,
+	 .ident = "Acer Aspire 7720",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
+		},
+	},
 	{}
 };
 
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