If you are not sure, say Y here.
+config THINKPAD_ACPI_INPUT_ENABLED
+ bool "Enable input layer support by default"
+ depends on THINKPAD_ACPI
+ default y
+ ---help---
+ Enables hot key handling over the input layer by default. If unset,
+ the driver does not enable any hot key handling by default, and also
+ starts up with a mostly empty keymap.
+
+ If you are not sure, say Y here. Say N to retain the deprecated
+ behavior of ibm-acpi, and thinkpad-acpi for kernels up to 2.6.21.
+
+
endif # MISC_DEVICES