Hi , Thank you very much for your answer. <pre>>> And why sometimes the xevent->type is not right? (if the event_base = 96 , >> then sometimes the xevent->type always be 98 but not 97) > >"Sometimes" before "always" sounds pretty confusing to me. :) </pre>Those codes are from gnome-power-manager program, it will judge the xevent->type, and when it works normally, the xevent->type will be equal with event_base + XSyncAlarmNotify(it is defined as 1), but sometimes the program will become abnormal , then after print the value of xevent->type we found that it will be "event_base + 2" but not "event_base + 1" at this situation. I am sorry for my poor English to make you confuse. <pre>>Thus, >whenever a triggering condition of a previously registered alarm occurs, the >interested client will be notified with a XSyncAlarmNotify event. </pre>Does that means that I could registered XSyncAlarm to the X server?  How to do that, could you tell me? I want to let X server notify me when it has been idle for a given time. And I will also try to find out from the document you mentioned. Thanks again. <div>-- <div> Best Regards, </div> </div> <pre> At 2010-12-04 23:55:56，"Fernando Carrijo" <fcarrijo.lists@gmail.com> wrote: >Hi Danny, > >danny <tornadory@163.com> wrote: > >> Could you explain about the XSyncAlarmNotify? What's function it provides? >> Which situation could it be sent by X server? > >It seems to me XSyncAlarmNotify is an event type, not a request type. And as >such, it is delivered from server to clients, not the other way around. Thus, >whenever a triggering condition of a previously registered alarm occurs, the >interested client will be notified with a XSyncAlarmNotify event. > >With respect to your first email: yes, a XSync enabled server keeps info about >its idle time but, from the top of my head, I don't remember which piece of the >protocol you can use to query it. > >Anyway, the fact is: the implementation of the XSync Extension, both client- >and server-side, is kind of easy to understand. Reading the code won't be hard, >after you grasp the main concepts introduced in the specifications. Give them >a try! > >> And why sometimes the xevent->type is not right? (if the event_base = 96 , >> then sometimes the xevent->type always be 98 but not 97) > >"Sometimes" before "always" sounds pretty confusing to me. :) > >I'm not sure about it. >_______________________________________________ >xorg-devel@lists.x.org: X.Org development >Archives: http://lists.x.org/archives/xorg-devel >Info: http://lists.x.org/mailman/listinfo/xorg-devel </pre> <hr/> <a href="http://help.163.com/special/007525G0/163mail_guide.html?id=2716" target="_blank">网易163/126邮箱百分百兼容iphone ipad邮件收发</a>