Commit 797de7bd authored Apr 05, 2008 by Linus Torvalds

Revert "ACPI: Ignore _BQC object when registering backlight device"

This reverts commit 7c0ea45b which
caused a regression with the backlight being set to off when a laptop
doesn't have a _BQC entry to query the actual backlight value.  The code
blindly then falls back on a value of 0.

See
	http://bugzilla.kernel.org/show_bug.cgi?id=10387
	http://lkml.org/lkml/2008/4/2/366



for details.

Bisected-and-reported-by: Andrey Borzenkov <arvidjaar@mail.ru>
Cc: Zhao Yakui <yakui.zhao@intel.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 6fdf5e67

drivers/acpi/video.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -713,7 +713,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)

		kfree(obj);

		if (device->cap._BCL && device->cap._BCM && max_level > 0) {
		if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
		int result;
		static int count = 0;
		char *name;

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