MBP Unibody not sleeping

sarkozy

I've reset the SMC and PRAM. While it seems to sleep with the MagSafe out, I get the sleep problem when it's plugged in. One Apple thread suggested running this command in the terminal to determine what program is preventing sleep: pmset -g assertions.

This is what it output:

Assertion status system-wide:
   ChargeInhibit                           0
   PreventUserIdleDisplaySleep             0
   PreventUserIdleSystemSleep              0
   NoRealPowerSources_debug                0
   CPUBoundAssertion                       0
   EnableIdleSleep                         1
   PreventSystemSleep                      1
   DisableInflow                           0
   DisableLowPowerBatteryWarnings          0
   ExternalMedia                           0

Listed by owning process:
  pid 16: [0x0000012c00000010] PreventSystemSleep named: "org.cups.cupsd" 

Kernel Assertions: 0x0008 
 * Kernel Assertion ID = 500
   Created At = 01/01/1970 01:02:48 GMT 
   Modified At = 01/01/1970 01:00:00 GMT 
   Owner ID = 0xffffff800bdb0000
   Level = 0
   Assertions Set = None (4)

 * Kernel Assertion ID = 501
   Created At = 01/01/1970 01:02:51 GMT 
   Modified At = 01/01/1970 01:00:00 GMT 
   Owner ID = 0xffffff800bdc6000
   Level = 0
   Assertions Set = None (4)

 * Kernel Assertion ID = 502
   Created At = 01/01/1970 01:03:12 GMT 
   Modified At = 06/03/2012 15:06:55 GMT 
   Owner ID = 0xffffff800be40e00
   Level = 0
   Assertions Set = None (32)

 * Kernel Assertion ID = 503
   Created At = 06/03/2012 15:08:09 GMT 
   Modified At = 01/01/1970 01:00:00 GMT 
   Owner ID = 0xffffff800d9e7000
   Level = 255
   Assertions Set = None (8)

It may be that my problem is the same as one of the users:

as mentioned in the previous post. In my case it was some CUPS print driver. I un-installed the "printer" and things are back to normal.

Not sure where to go from here, or even if it's safe.

sarkozy

FYI, I solved it after finding this thread: http://superuser.com/questions/373566/macbook-not-going-to-sleep

Basically, a printer driver somehow thought I was still attempting to print a document. Once I took the printer offline, the problem was resolved.

In future, this seems a great method to pinpoint what's causing a sleep issue in OS X.

Colonel Panic

Do you have printer sharing enabled?

EDIT: Nevermind, it was something else!

sarkozy

PPDs were also shared. Even Adobe Acrobat. I turned that off, too.

Deep Thought

I find a nice mug of Hot Chocolate works wonders...:D

sarkozy

Deep Thought wrote: »

I find a nice mug of Hot Chocolate works wonders...:D

Huh?