Recently my fan has been coming on a lot, even when idle so I decided to have a little investigation as I am also currently suffering slowdowns as well.
Running a 17" MBP dual core (2.33ghz) (2006 MBP4 i think). Upgraded from SL to Lion 2 weeks ago.
in my Activity monitor Coreaudiod is running anywhere between 81% CPu to 120% CPU usage, 6 or 7 threads.( yes i know activity monitor max CPU for my machien is 200% as it is dual core)
Now I this is obscenly high as I am currently not running anything else and no sound is being used. This is with just activity monitor & Firefox open.
using Temp monitor it shows the following:
CPU core 1; 92-99'C
CPU core 2 : 89-90'c'C
CPU a temperature diode 94'c
CPU A proximity: 72'c
every other temp is well within normal ranges and under 60'c.
My fan now comes on within a minute of booting the MBP, I have tried resetting PRAM, SMC, have tried the common fixes of stopping CoreAudioD in activity monitor only for it to restart instantly with the same high CPU load. I have tried terminal to rename the plist for coreaudio both in my users section and the launchdeamons ( which stopped my audio completly). although when I disabled it via the launchdeamon section my cpu temp returned to normal ( was down at 54'c even when using youtube- albeit without sound) I am at a loss. Have spent days on the net searching for solutions but they all point to an error when Coreaudiod freezes.
The machine is getting so hot I am worried it is going to do some damage.
Any ideas or help would be greatly appreciated.
Sleep well, MacDuff.