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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-10-30 18:02:07 -0200
committerLen Brown <len.brown@intel.com>2007-11-05 13:07:11 -0500
commit87cc537a54fc017d998cf603f5fab9ca4a85d668 (patch)
treee69421b6f749853f2d9444c3f458b260eb503d4f /Documentation
parenta3f104c02ab842574e699186cf953551aafe2ca9 (diff)
ACPI: thinkpad-acpi: add brightness_force parameter
Add a "brightness_enable" module parameter that allows the local admin to force the backlight support to not be enabled. It can also be used to force the backlight support to be enabled, but that is currently a no-op as the backlight support is enabled by default when available. This will be changed by a different patch. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/thinkpad-acpi.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index a743bfa62b95..f877c13c5ef8 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -944,6 +944,10 @@ When display backlight brightness controls are available through the
standard ACPI interface, it is best to use it instead of this direct
ThinkPad-specific interface.
+The brightness_enable module parameter can be used to control whether
+the LCD brightness control feature will be enabled when available.
+brightness_enable=0 forces it to be disabled.
+
Procfs notes:
The available commands are: