Hi When we press the key like brightness up/down from keyboard, kernel will receive the keyevent. My question is how the keyevent from kernel call the code of xf86-video-intel like intel_output_dpms_backlight etc to adjust the backlight. Can someone help to explain more details about it? Thanks! Li Hao Best Regards Email:hao.h.li at intel.com<mailto:hao.h.li at intel.com> Tizen Enabling Team Software and Service Group Intel Asia-Pacific Research & Development Ltd. Tel: 86-21-61167039 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20130712/a0aba1b3/attachment.html>