site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Hi Eric- Sorry. Not preventable at all. -ethan On Dec 2, 2005, at 1:08 PM, apple_lists@mobileneurons.com wrote: Greetings, // Include <IOKit/pwr_mgt/RootDomain.h> // Prevents hard sleep when closing lid. found in Insomnia::init() IOPMrootDomain *root = getPMRootDomain(); root->receivePowerNotification(kIOPMDisableClamshell); // Allows hard sleep when closing lid. found in Insomnia::free() IOPMrootDomain *root = getPMRootDomain(); root->receivePowerNotification(kIOPMEnableClamshell); * http://binaervarianz.de/projekte/programmieren/meltmac/ I appreciate any and all commentary. Most humble regards, Eric Coffin mobileneurons _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/ebold%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Sorry, catching and preventing hard sleep is impossible, even from the kernel. I have not seen Insomnia.kext before, but that kext has a funny, if completely unsupported technique for disabling clamshell sleep. When you attempted to kextload Insomnia.kext at kIOMessageSystemWillSleep time, the kernel had already run through the clamshell checks; Insomnia.kext would have loaded far too late. I have been reading through documentation and mailing list archives for sometime in search of a particular bit of functionality specific to apple laptops. I need to catch and veto hard sleep caused by the closing of a laptop lid on system running OS 10.4.
From my research I understand that this may be achieved through the Kernel, likely through a KEXT. I have looked at the example RegisterForSleep, which shows how a program can register to listen for and handle system sleep calls. This allows an application to prevent idle sleep and gives them the oppourtunity to do some housekeeping before an impending hard sleep, caused by closing the laptop, or clicking sleep from the apple menu. I have also looked at the KEXT called Insomnia* which when installed prevents the system from going into hard sleep when the laptop lid is closed. This is achieved by communicating with the root power domain:
Though preventing sleep is part of the solution I need to implement, more importantly I must be able to catch it, prevent it. Attempting a combination of RegisterForSleep and Insomnia did not do it. I loaded the KEXT when the event kIOMessageSystemWillSleep was sent to my program but to no avail. The system will sleep. I have read a few brief snippets within the mailing list that said it is possible to catch a hard sleep at the kernel level and veto it, but I have yet to discover how to do this. In an older version of <IOKIT/pwr_mgt/IOPM.h> I came across the following enumeration definition: // Power events enum { kClamshellClosedEventMask = (1<<0), // User closed lid kDockingBarEventMask = (1<<1), // OBSOLETE kACPlugEventMask = (1<<2), // User plugged or unplugged adapter kFrontPanelButtonEventMask = (1<<3), // User hit the front panel button kBatteryStatusEventMask = (1<<4) // Battery status has changed }; kClamshellClosedEventMask looks very interesting. I don't have a sense of how I could setup a event listener for this though. As well, the current IOPM.h file on my system is actually without this definition. This email sent to ebold@apple.com This email sent to site_archiver@lists.apple.com