Snow Leopard Sleep Issue

I am having the same issue. I did a normal Snow Leopard install, and the display will not stay asleep. I've set up a hot-corner to put it to sleep, but it doesn't stay asleep for more than a few seconds.

I also installed Snow Leo on 4 different machines... (installed as an update from Leopard) same issue!!!

I have a similar issue. My laptop will sleep, but it takes awhile to wake back up (>5 minutes). Then when it does, the performance isn't up to par, until I either reboot, or logout/login.

Okay, I found something that might work. My iChat status was listed as "available." I went into iChat and told it not to sign me on at login. Now, even if I'm still listed as "available," the display can go to sleep.

I tried with iChat ,it is not even open,...did not work :o/

I have 4 Macs. Imac 24, New unibody Mac Book PRo15" Mac Pro 2.66dualx2 and Mac Pro Nehelem. All sleep fine except the Nehelem. I have called apple support and sent them a report and expect to hear from them in a week. Must be something it the back round that is keeping it from sleeping.

Same issue for me on my Imac. It's really boring. Hopefully, manual sleep works fine.

Same issue on my iMac (mid 2007) upgraded from Leopard. This is really boring. Hopefully manual sleep works fine.

I solved this problem with an application from DragonOne called PleaseSleep (compatible with Snow Leo). Automatic sleep works fine now.

I had sleep problems on my MBP caused by iTaf, the freeware 3rd part app:

http://discussions.apple.com/thread.jspa?threadID=2144564&tstart=15

Our iMac (intel) would not wake from sleep and the beach ball kept spinning until we did a forced shutdown. Finally went to sys prefs and Desktop/screen saver where we discovered that screensaver was searching for a picture folder. After force quitting sys prefs, we selected another folder and now the sleep works normally.

In my case, even the manual sleep does not work : computer goes to sleep but after 5 s it wakes up. Why did MacOSX become insomniac ?

I had exactly the same problem when i installed snowleopard (10.6). If you check the console you'll find the problem very fast. (some stupid alarms set in com.apple.AutoWake.plist)
Here's the solution: go to 'Macintosh HD' - /Library/Preferences/SystemConfiguration , there you'll find a file called 'com.apple.AutoWake.plist', delete the file and your SnowLeo will sleep again.
The new file will be created if you have any apps to wakeUp your MAC (e.g. ItunesSleep) or if you use the 'start up or wake' Schedule in 'Energy Saver'. But don't worry, the new file is correct and its not necessary to delete it again and again.

cu, Lx

maclx wrote:
Here's the solution: go to 'Macintosh HD' - /Library/Preferences/SystemConfiguration , there you'll find a file called 'com.apple.AutoWake.plist', delete the file and your SnowLeo will sleep again.

Perfect, it works great ! 🙂