diff options
author | Zhang Rui <rui.zhang@intel.com> | 2009-04-09 14:24:35 +0800 |
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committer | Len Brown <len.brown@intel.com> | 2009-04-11 01:05:58 -0400 |
commit | e047cca66c6bb0b1c346e91305011aab79dfc4b0 (patch) | |
tree | c656787366e002db0ce091a1629f19d0566f94fa /drivers/hwmon | |
parent | d848223808c5d21e1b3cea090047e34722c6254b (diff) |
ACPI video: handle indexed _BQC correctly
In the current code, for a box with an indexed _BQC method, we
1. get the current brightness level by evaluating _BQC
2. set the value gotten in step 1 to _BCM
3. get the current brightness level again
4. set the _BQC_use_index flag if the results gotten
in step 1 and in step 3 don't equal.
But this logic doesn't work actually, because the _BQC_use_index
is not set when acpi_video_device_lcd_set_level is invoked.
This results in a failure in step 2.
http://bugzilla.kernel.org/show_bug.cgi?id=12249#c83
Now, we set the _BQC_use_index flag after invoking _BQC for the first
time. And reevaluate the _BQC to get the correct brightness level.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/hwmon')
0 files changed, 0 insertions, 0 deletions