Exists sleep with lid down when MagSafe connected

Hi,

My macbookopro has started exiting sleep mode when the lid is down but only when the magsafe is connected, I don't mean when I connect the magsafe just when it goes to sleep connected to magsafe. The sleep settings for the drive and display are the same of battery and mains settings.

The mac sleeps (flashing light) and when I lift the mac and tilt it around, especially turn it upside down I hear the fan start and the led lights. I open the lid and sometimes the display comes on other times not, if I remove the magsafe when the screen is blank it immediately turns on!

When running (or sleeping) on battery none of this happens even if I enter sleep with magsafe connected and then remove it and tilt the macbook around and turn it upside down.

I've reset the Pram, SMC and even tried turning the SMS off. No applications are running and timemachine is off, oh and it doesn't wake on network access.

Any idea's ?

Thanks

Steve

 

Nope nothing connected. Originally I thought maybe the lid was pressing on the keyboard or mousepad and waking the machine up but why would that only happen when power is connected!!!

Also if I don't fully close the lid the machine sleeps as usual but when it seems to wake with the power connected the keyboard and screen don't always come on but the light on the front turns on, i can hear the fan and what appears to be the HD arm moving a little. If I disconnect the power the screen and keyboard light up.

Very strange.

 

Just had a look at the syslog and found the following reason for waking from sleep:

$ syslog|grep -i "Wake reason"

kernel[0] <Debug>: Wake reason: OHC1
kernel[0] <Debug>: Wake reason: OHC1
....
....
....

kernel[0] <Debug>: Wake reason: OHC1
kernel[0] <Debug>: AirPort_Brcm43xx:owerChange: System Wake - Full Wake/ Dark Wake / Maintenance wake
kernel[0] <Debug>: Previous Sleep Cause: 5
kernel[0] <Debug>: The USB device Apple Internal Keyboard / Trackpad (Port 6 of Hub at 0x4000000) may have caused a wake by issuing a remote wakeup (2)


So it looks like the keyboard is causing the problem. I've cleaned the screen (dust on it) and also cleaned and blown a lot on the keyboard and so far it seems to be ok. I'm thinking maybe the issue is dust touching the trackpad. Not a clue what this problem would only happen when power connected though!!!

 

Not even an option, I think thats on newer hardware.