I've got a month-old MBP and starting yesterday the kernel_task has jumped to 105% of CPU usage and is completely bogging down my system (and killing my battery). Here's what I've already tried to isolate the problem: Restart Correct permissions/fix file system (with Disk Utility and fsck) Cleared space on the HD (in case the problem was with swapping) Tested to see if the problem reproduced in a brand new user acct (it did) Cleared system and user caches Started in safeboot mode Ran TechTool to look for hardware problems Re-installed OS. Here's what Console.log says soon after restart. Mac OS X Version 10.4.10 (Build 8R4061a) 2007-10-25 09:23:24 -0500 2007-10-25 09:23:25.152 loginwindow FSResolveAliasWithMountFlags returned err = -43 2007-10-25 09:23:25.274 HPEventHandler: DebugAssert: Third Party Client: (NULL != m_lock && 0 == errno) Can't create semaphore lock[/Volumes/Development/HP/Mac-Sirani/mac-software/components/HPEventHandler/Sources/Core/HPTMNotificationManager.cpp:62] 2007-10-25 09:23:26.712 SystemUIServer MenuCracker see http://sourceforge.net/projects/menucracker MenuCracker is now loaded. Ready to accept new menus. Ignore the failure message that follow. 2007-10-25 09:23:26.715 SystemUIServer failed to load Menu Extra: NSBundle </Library/PreferencePanes/MenuMeters.prefPane/Contents/Resources/MenuCracker.menu> (loaded) 2007-10-25 09:23:27.311 SystemUIServer CFLog (21): dyld returns 2 when trying to load /Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio 2007-10-25 09:23:27.316 SystemUIServer CFLog (22): Cannot find function pointer NewPlugIn for factory C5A4CE5B-0BB8-11DOct 25 09:23:27 Lair-of-Tomcat-IV /usr/sbin/AppleFileServer: AFPServer::AbnormalATListenerShutDown - clear listener 8-9D75-0003939615B6 in CFBundle/CFPlugIn 0x3bcc70 </Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin> (bundle, not loaded) 2007-10-25 09:23:28.771 SystemUIServer Normally MenuMeterMemExtra would not have been loaded as a Menu Extra. 2007-10-25 09:23:28.789 SystemUIServer MenuMeterMem loaded. 2007-10-25 09:23:28.789 SystemUIServer Normally MenuMeterCPUExtra would not have been loaded as a Menu Extra. 2007-10-25 09:23:28.968 SystemUIServer MenuMeterCPU loaded. Oct 25 09:23:29 Lair-of-Tomcat-IV mDNSResponder: getifaddrs ifa_netmask for vmnet1(5) Flags 8863 Family 2 192.168.120.1 has different family: 0 Oct 25 09:23:40 Lair-of-Tomcat-IV mDNSResponder: getifaddrs ifa_netmask for vmnet1(5) Flags 8863 Family 2 192.168.120.1 has different family: 0 Oct 25 09:23:43 Lair-of-Tomcat-IV mDNSResponder: getifaddrs ifa_netmask for vmnet1(5) Flags 8863 Family 2 192.168.120.1 has different family: 0 Oct 25 09:23:43 Lair-of-Tomcat-IV mDNSResponder: Repeated transitions for interface en1 (10.0.1.200); delaying packets by 5 seconds Anyone have any thoughts? My next step would be to wipe the drive and do a clean install, but my external HD is a mess right now and I have no place to put my data. Thanks!