Imported linux-2.6.27.39 suse/xen patches.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.arch / 0002-Acer-WMI-fingers-off-backlight-video.ko.patch

From: Thomas Renninger <trenn@suse.de>
Subject: [PATCH] Acer-WMI: fingers off backlight if video.ko is serving this functionality
Patch-Mainline: queued for .28 in Len's/ak's ACPI tree

commit 017f8ecd1cedb482392f0500ee3701b8c50a46f9

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 drivers/misc/acer-wmi.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/misc/acer-wmi.c
+++ b/drivers/misc/acer-wmi.c
@@ -1242,6 +1242,12 @@ static int __init acer_wmi_init(void)
 
 	set_quirks();
 
+	if (!acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
+		interface->capability &= ~ACER_CAP_BRIGHTNESS;
+		printk(ACER_INFO "Brightness must be controlled by "
+		       "generic video driver\n");
+	}
+
 	if (platform_driver_register(&acer_platform_driver)) {
 		printk(ACER_ERR "Unable to register platform driver.\n");
 		goto error_platform_register;