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-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 7c7bd4720cfc..3fb864733ca1 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -475,6 +475,10 @@ Non hot-key ACPI HKEY event map:
The above events are not propagated by the driver, except for legacy
compatibility purposes when hotkey_report_mode is set to 1.
+0x5010 Brightness level changed (newer Lenovo BIOSes)
+
+The above events are propagated by the driver.
+
Compatibility notes:
ibm-acpi and thinkpad-acpi 0.15 (mainline kernels before 2.6.23) never