Display sleeps only for a moment

[RealRedHair]

Since some days my display will go to sleep when pressing ctrl cmd eject keys. BUT is wakes up after just 5-15 seconds.

Restarted and did a repairing disk permissions. Not yet done resetting PRAM, and resetting the SMC.

How to solve this??? Any tips/suggestions?

 

[GGJstudios]

Mac OS X: Why your Mac might not sleep or stay in sleep mode
Determine why your Mac wakes up from sleep

 

[RealRedHair]

Mac OS X: Why your Mac might not sleep or stay in sleep mode
Determine why your Mac wakes up from sleep

Thanks but this is mainly about sleep of the whole computer. That works fine for me. I have only a problem with the display waking up and not going to sleep.

 

[RealRedHair]

Any suggestions????

Did find: http://mactips.dwhoard.com/mactips/system/display-sleep not reallly solution.

Did PRAM and SMC reset, no effect.

Is there a syslog command to find out what caused the wake up of the display? (not the machine)
syslog |grep -i "Wake reason ="

 

[RealRedHair]

Any advice??

Found this link: https://discussions.apple.com/thread/3191631?start=0&tstart=0

But do not see which kernel is the problem:

Index Refs Address Size Wired Name (Version) <Linked Against>
50 0 0x909000 0x2b000 0x2a000 at.obdev.nke.LittleSnitch (2.2.05) <7 5 4 3 1>
133 0 0x1864000 0xd000 0xc000 com.taoeffect.ispy.kext (2.0.1) <5 4 3 1>
134 0 0x8920e000 0x4000 0x3000 com.sophos.kext.sav (7.3.0) <5 4 1>
137 0 0x87ccc000 0x6000 0x5000 foo.tap (1.0) <12 11 9 7 4 1>
138 0 0x17f5000 0x6f000 0x6e000 com.cisco.nke.ipsec (2.0.1) <4 1>
139 0 0x87cc4000 0x6000 0x5000 foo.tun (1.0) <12 11 9 7 4 1>

Under System profiler all seems fine:

System Power Settings:

AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 3
Sleep On Power Button: No
Automatic Restart On Power Loss: No
Wake On LAN: No
Current Power Source: Yes
Display Sleep Uses Dim: No

Hardware Configuration:

UPS Installed: No

P.S. the screensaver does stay on - so whatever is waking the sleep display isn't disturbing the screen saver!

In the console I cannot find to much; I'm not an expert. Only see:

10/29/11 9:02:41 PM kernel Message Version Check or Length Not Match.
10/29/11 9:02:41 PM kernel Message Length Check - msglength = 3152, expectingLength = 3152
10/29/11 9:02:41 PM kernel Message Version Check - msg(0.0.0)@0x14875024 atifb3.1.0)
10/29/11 9:00:06 PM com.apple.RemoteDesktop.agent[165] Sat Oct 29 21:00:06 Raoul-Vernedes-iMac.local AppleVNCServer[194] <Error>: kCGErrorIllegalArgument: CGSGetDisplayBounds (display 7fff)

coming back often.

Found a work-around: when I put the display sleeping time to never I can manually put the screen to sleep and it will not wake up!! Thats fine for the moment.

So the conclusion must be that the problem is within the mechanism of display sleeping and not that some other program or process is waking up the sleeping screen. How can I update or validate that process?

Any suggestions????