[Qt Extended Improved] Alarm wake up from suspend

andrew howlett andrew at howlett.net
Fri Mar 27 22:23:28 CET 2009

Hi all,

I've been trying to enable wake from suspend for alarms in QtEI, and I've sorta got it. This file:


replaces the file of the same name at qt-extended-improved/src/server/coreserver/alarmcontrol.cpp

The code will set a RTC alarm 15 seconds before the alarm. The FR will wake up at the appropriate time. But the alarm doesn't go off. Sometimes the alarm will sound 25 seconds later, sometimes longer. The problem seems to be the QObject event Timer system. The AlarmControl system starts a QObject timer. The timer is supposed to generate an event at the alarm time, but the event is late, sometimes very late. Suspend seems to bugger up the QObject timer system.

So I'm posting what I've done so far in the hope that a brighter light than I can illuminate the QObject timer problem.

Andrew Howlett.

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