On Wed, 2012-03-21 at 11:00 +0800, joeyli wrote: > think the hotkey of backlight control only works with acpi_osi=Linux ? yes , hot key control only works with this option.Any ideas about where the hot key events gets handled ? I tried logging inside 'acpi_video_device_notify' method in video.c . But the control does not seem to reach here . Thanks, Pradeep Subrahmanion -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html