After a power failure, my Intel iMac now takes 30 seconds to go to sleep. I'm assuming that this is an application that is failing to close and then the OS forces the issue.
Even when there are no applications open and after a fresh shutdown-restart, the problem persists. Force Quit window is empty (no apps running). It probably is an app that runs on startup that is causing the problem.
How do I go about figuring out which one is the culprit?
If I wake the machine up and then put it to sleep immediately, the sleep is almost instantaneous, as it used to be.
my system library>startupitems is empty and I don't have a startupitems folder in my user library.
Disconnecting USB devices has no effect.
Even though this sleep issue is probably not related to them, I reset EFI and PRAM to no effect.
Rusty, you know what happens when you put the Mac to sleep: it writes all your Ram memory to the harddisk... The more memory you have the more time (and place) it takes. I think Apple calls this Safe hibernate (mode 3). On your disk is a "sleepimage" file that has the same size as your Ram...
And, yes, it is easily changed if you don't want to have hibernatemode 3.
Done that already, no change.
I'm aware of the change of hibernate mode to, but if this were the issue, I should not be able to put it to sleep in a couple of seconds immediately after wakening it. That mode should force 30 seconds 100% of the time if I'm not mistaken. The second sleep will be just a couple of seconds if I go sleep -- wake -- sleep.
Remember that this all started from a power failure.
Thanks for your help.
I just checked. The hibernatemode was set at 0.
Yes, I'm aware of this and it's not the issue.
Thanks
More troubleshooting info:
Activity Monitor shows what we would expect: a burst of CPU, disk, and network at the sleep command then about 28 seconds of doing nothing.
I tried stopping some non-essential services, but no change.
Launch the Console application and select "system.log" from the file list. Clear the display by clicking the broom icon in the toolbar. Put the machine to sleep and wake it up. Post any new messages that appear in the log -- only one example of each set of repeated entries, please.
Here's the log portion from the sleep:
Jul 5 10:02:54 PSCiMac loginwindow[450]: loginwindow SleepWakeCallback WILL sleep
Jul 5 10:02:54 PSCiMac mDNSResponder[17]: DeregisterInterface: Frequent transitions for interface vnic0 (0000:0000:0000:0000:0000:0000:0000:0001)
Jul 5 10:02:54 PSCiMac mDNSResponder[17]: DeregisterInterface: Frequent transitions for interface vnic1 (0000:0000:0000:0000:0000:0000:0000:0001)
Jul 5 10:02:55 PSCiMac kernel[0]: AFPSleepWakeHandler: going to sleep
It took 30 seconds from 10:02:54
Thanks
It seems that Parallels is causing the problem. To confirm, either uninstall it or boot in safe mode and test.
Safe mode test produced the same 30 second sleep.
What pointed you toward Parallels?
The "vnic" devices are virtual network interfaces created by Parallels. But they wouldn't be present in safe mode, so that must be a red herring. In fact, reproducing the problem in safe mode rules out all third-party software as the cause.
Are there any messages in /private/var/log/kernel.log associated with sleep?
This what I found in kernal.log:
Jul 5 10:52:04 PSCiMac kernel[0]: System Sleep
Jul 5 10:52:11 PSCiMac kernel[0]: Previous Sleep Cause: 0
Jul 5 10:57:49 PSCiMac kernel[0]: /drv/ MacModule.cpp:266 powerStateWillChangeTo: found flag=kIOPMSleepCapability (4)
Jul 5 10:57:49 PSCiMac kernel[0]: /drv/ MacModule.cpp:266 powerStateDidChangeTo: found flag=kIOPMSleepCapability (4)
Jul 5 10:57:49 PSCiMac kernel[0]: System Sleep
Jul 5 10:57:50 PSCiMac kernel[0]: Previous Sleep Cause: 0
It repeats in multiple sections.
Mac takes 30 seconds to go to sleep
