---------------------------
-What: /proc/acpi/button
-When: August 2007
-Why: /proc/acpi/button has been replaced by events to the input layer
- since 2.6.20.
-Who: Len Brown <len.brown@intel.com>
-
----------------------------
-
What: /proc/acpi/event
When: February 2008
Why: /proc/acpi/event has been replaced by events via the input layer