MacBook Pro won't sleep automatically - no process preventing sleep according to pmset. What's going on?

Question

i noticed the following problem with my MBP 8,1 running 10.7.2 — automatic sleep just doesn’t happen. Since I usually put my Macbook to sleep manually before leaving the desk etc. I just noticed this issue and can’t really pinpoint it to specific updates.
Closing the lid works, selecting “sleep” from the Apple menu works. The only way to put my MBP to sleep automatically is currently PleaseSleep, which works fine.
Here’s pmset -g:
  pmset -g
Active Profiles:
Battery Power       1
AC Power        -1*
Currently in use:
standbydelay   4200
standby    0
womp       1
halfdim    1
panicrestart   157680000
hibernatefile  /var/vm/sleepimage
sms        1
networkoversleep   0
disksleep  10
sleep      10
hibernatemode  3
ttyskeepawake  1
displaysleep   3
acwake     0
lidwake    1
As you can see, no process is preventing sleep.
Here’s pmset -g assertions:
pmset -g assertions
25.12.11 03:05:34 MEZ  
Assertion status system-wide:
   ChargeInhibit                           0
   PreventUserIdleDisplaySleep             0
   PreventUserIdleSystemSleep              0
   NoRealPowerSources_debug                0
   CPUBoundAssertion                       0
   EnableIdleSleep                         1
   PreventSystemSleep                      0
   DisableInflow                           0
   DisableLowPowerBatteryWarnings          0
   ExternalMedia                           0
Kernel Assertions: 0x0004
* Kernel Assertion ID = 500
   Created At = 01.01.70 01:03:17 MEZ  
   Modified At = 25.12.11 02:46:14 MEZ  
   Owner ID = 0xffffff800b664000
   Level = 255
   Assertions Set = None (4)
* Kernel Assertion ID = 501
   Created At = 01.01.70 01:03:21 MEZ  
   Modified At = 01.01.70 01:00:00 MEZ  
   Owner ID = 0xffffff800b674000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 502
   Created At = 01.01.70 01:05:31 MEZ  
   Modified At = 25.12.11 02:38:13 MEZ  
   Owner ID = 0xffffff800b704200
   Level = 0
   Assertions Set = None (32)
Any ideas? I tried resetting the SMC, to no avail. Thanks in advance!

Answer 1

here you go -- and thanks again.
Last login: Sun Dec 25 19:24:05 on ttys000
Pavels-MacBook-Pro:~ pavel$ kextstat -kl | awk ' !/com\.apple/ { print $6 $7 } 'Pavels-MacBook-Pro:~ pavel$ sudo launchctl list | sed 1d | awk ' !/0x|apple|com\.vix|edu\.|org\./ { print $3 } '
Password:
com.google.keystone.daemon
com.barebones.textwrangler
com.barebones.authd
Pavels-MacBook-Pro:~ pavel$ launchctl list | sed 1d | awk ' !/0x|apple|edu\.|org\./ { print $3 } '
com.culturedcode.thingshelper
com.google.keystone.root.agent
ws.agile.1PasswordAgent
com.valvesoftware.steamclean
Pavels-MacBook-Pro:~ pavel$ ls -1A {,/}Library/{Ad,Compon,Ex,Fram,In,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Sta}* 2> /dev/null
/Library/Components:
/Library/Extensions:
/Library/Frameworks:
AEProfiling.framework
AERegistration.framework
AudioMixEngine.framework
NyxAudioAnalysis.framework
PluginManager.framework
TSLicense.framework
XSKey.framework
iLifeFaceRecognition.framework
iLifeKit.framework
iLifePageLayout.framework
iLifeSQLAccess.framework
iLifeSlideshow.framework
/Library/Input Methods:
/Library/Internet Plug-Ins:
Disabled Plug-Ins
Flash Player.plugin
Flip4Mac WMV Plugin.plugin
JavaAppletPlugin.plugin
Quartz Composer.webplugin
QuickTime Plugin.plugin
flashplayer.xpt
googletalkbrowserplugin.plugin
iPhotoPhotocast.plugin
npgtpo3dautoplugin.plugin
nsIQTScriptablePlugin.xpt
/Library/LaunchAgents:
com.google.keystone.agent.plist
/Library/LaunchDaemons:
com.apple.aelwriter.plist
com.apple.remotepairtool.plist
com.barebones.authd.plist
com.barebones.textwrangler.plist
com.google.keystone.daemon.plist
/Library/PhonePlugins:
Nokia_5230_isync_plugin_2v0.phoneplugin
/Library/PreferencePanes:
Flash Player.prefPane
Flip4Mac WMV.prefPane
Growl.prefPane
Perian.prefPane
/Library/PrivilegedHelperTools:
com.barebones.authd
com.barebones.textwrangler
/Library/QuickLook:
iWork.qlgenerator
/Library/QuickTime:
AC3MovieImport.component
AppleIntermediateCodec.component
AppleMPEG2Codec.component
Flip4Mac WMV Advanced.component
Flip4Mac WMV Export.component
Flip4Mac WMV Import.component
Google Camera Adapter 0.component
Google Camera Adapter 1.component
Perian.component
/Library/ScriptingAdditions:
/Library/StartupItems:
Library/Address Book Plug-Ins:
.DS_Store
AdiumAddressBookAction_AIM.scpt
AdiumAddressBookAction_ICQ.scpt
AdiumAddressBookAction_Jabber.scpt
AdiumAddressBookAction_MSN.scpt
AdiumAddressBookAction_SMS.scpt
AdiumAddressBookAction_Yahoo.scpt
SkypeABDialer.bundle
SkypeABSMS.bundle
Library/Input Methods:
.localized
Library/Internet Plug-Ins:
.DS_Store
Picasa.plugin
Library/LaunchAgents:
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.FA1728C5-B917-44F7-90CD-921 9143D5B9B.plist
com.apple.FolderActions.enabled.plist
com.apple.FolderActions.folders.plist
com.valvesoftware.steamclean.plist
ws.agile.1PasswordAgent.plist
Library/PreferencePanes:
.DS_Store
Hazel.prefPane
Library/ScriptingAdditions:
.DS_Store
TextExpander Addition.osax
Library/Services:
.DS_Store
Combine PDF pages.workflow
GraphicConverter.service
Mail selected items.workflow
New PDF from Images.workflow
Resize images.workflow
WordService.service
selected to Bean.workflow
Pavels-MacBook-Pro:~ pavel$