Monitor won't sleep

[miamialley]

Even though I've had the same setting (monitor goes to sleep after 10mins) since I got my ALUM MBP 18 months ago, the monitor will often not sleep. It just stays on. I restart...sometimes it will sleep (after appropriate inactivity) and sometimes it won't. I don't have a screen saver of any sort enabled...just monitor goes off at 10 mins.

And yes I'm positive the mouse isn't being moved or keys pressed.

Ideas?

 

[DoFoT9]

what application do you leave active when this happens? i find some applications to be very tempremental - e.g. Safari, if there is flash on the website often my screen will not sleep.

i normally go back to the Finder and make it active, then the screen will sleep for me.

 

[miamialley]

what application do you leave active when this happens? i find some applications to be very tempremental - e.g. Safari, if there is flash on the website often my screen will not sleep.

i normally go back to the Finder and make it active, then the screen will sleep for me.

Hmm...I'm not sure I'll have to play with it. I've had the computer for a year without this problem. Not sure why it would start happening.

 

[DoFoT9]

Hmm...I'm not sure I'll have to play with it. I've had the computer for a year without this problem. Not sure why it would start happening.

hmm odd. maybe its worth checking out the program "Activity Monitor" (in the Utilities folder) and seeing if there is anything chewing CPU usage.

 

[miamialley]

hmm odd. maybe its worth checking out the program "Activity Monitor" (in the Utilities folder) and seeing if there is anything chewing CPU usage.

As of now it's working again. I set the monitor to turn off after 1 min to test and it works as planned.

Re: Activity Monitor, iTunes and Safari (Flash player) are each using 1.4%.

 

[DoFoT9]

As of now it's working again. I set the monitor to turn off after 1 min to test and it works as planned.

Re: Activity Monitor, iTunes and Safari (Flash player) are each using 1.4%.

hmm good to hear anyway.

those CPU usages are perfectly normal.

 

[miamialley]

hmm good to hear anyway.

those CPU usages are perfectly normal.

The thing is, in a few days the monitor will remain on when it should sleep again. I'll have to keep poking around. I just wondered if anyone else had the same issue and maybe found a fix (or cause).

Thanks for the help!