20% CPU load when idle, 27" iMac corei7 2,8Ghz

Hi every body
When I'm running Windows 7 Professional 64bit on Boot Camp 3.1, the system uses 20% CPU when idle.
I've tried to figure out what's causing the system load, and so far no luck. The task manager show these processes using CPU:
SYSTEM : 9%
DCPs : 6%
csrss.exe: 3%
Interrupts: 4%
The system is a fresh install, no programs installed, except Boot Camp. Even before I installed the Boot Camp drivers the CPU load was 20% when idle.
Has anyone had the same problem? And have you found a solution?
Message was edited by: Rune Månsson

If you have not already, you may want to also post your question in the Book Camp category
http://discussions.apple.com/category.jspa?categoryID=237
The system is a fresh install, no programs installed, except Boot Camp. Even before I installed the Boot Camp drivers the CPU load was 20% when idle.
If you have not booted into Windows, anything that happens under Mac OS X is something unrelated. In this case, it may be Spotlight indexing connected drives or some other background maintenance process. Leave the iMac running for a while and check to see if the CPU load is still 20%.

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bMaNoNe wrote:
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[2012-07-02 09:20] upgraded ca-certificates (20120212-1 -> 20120623-1)
[2012-07-02 09:20] upgraded perl-file-copy-recursive (0.38-1 -> 0.38-2)
[2012-07-02 09:20] upgraded libdrm (2.4.35-1 -> 2.4.37-1)
[2012-07-02 09:20] upgraded lib32-libdrm (2.4.35-1 -> 2.4.37-1)
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] PLEASE NOTE:
[2012-07-02 09:21] For these drivers to work, you must install kernel modules.
[2012-07-02 09:21] Depending on your kernel, these module packages are named
[2012-07-02 09:21] catalyst-$kernel and stock kernel module is catalyst
[2012-07-02 09:21]
[2012-07-02 09:21] OR simply use packages that provides auto re-compilation:
[2012-07-02 09:21] catalyst-hook or catalyst-daemon
[2012-07-02 09:21]
[2012-07-02 09:21] OR use catalyst-generator package to generate catalyst-{kernver}
[2012-07-02 09:21] packages
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] You can use the tool 'aticonfig' to generate an xorg.conf file.
[2012-07-02 09:21] --------------------- ^^^^^^^^^ --------------------------------
[2012-07-02 09:21] Add nomodeset to your kernel line in /boot/grub/menu.lst , ie.:
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[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] For more info and troubleshooting visit:
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[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] upgraded catalyst-utils (12.4-2 -> 12.6-1)
[2012-07-02 09:21] Building fglrx module for 3.3.6-1-ARCH kernel ...
[2012-07-02 09:21] Ok.
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] Automatic re-compilation is enabled now.
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] Answer 'Yes' whenever pacman ask you about updating
[2012-07-02 09:21] 'linux-headers' in first place
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] Provide headers to your kernel ie:
[2012-07-02 09:21] linux-headers if you are using linux.
[2012-07-02 09:21] Most of custom kernels provides own headers.
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] Add nomodeset to your kernel line in /boot/grub/menu.lst , ie.:
[2012-07-02 09:21] kernel /boot/vmlinuz-linux root=/dev/sda1 ro nomodeset
[2012-07-02 09:21] -------------------------------------------- ^^^^^^^^^ ---------
[2012-07-02 09:21] If experiencing problems with building module or using more than
[2012-07-02 09:21] one kernel use catalyst_build_module command as root, more info:
[2012-07-02 09:21] # catalyst_build_module help
[2012-07-02 09:21] - ^^^^^^^^^^^^^^^^^^^^^ ----------------------------------------
[2012-07-02 09:21] For more info and more troubleshooting visit:
[2012-07-02 09:21] http://wiki.archlinux.org/index.php/ATI_Catalyst
[2012-07-02 09:21] ----------------------------------------------------------------
[2012-07-02 09:21] upgraded catalyst-hook (12.4-4 -> 12.6-1)
I must note, that I'm still running kernel 3.3.6-1 since later kernel versions make another problem: https://bbs.archlinux.org/viewtopic.php?id=142174
I'm using an AMD A4-3400 APU with Catalyst 12.6.
Thanks for any hints,
PhotonX
Last edited by PhotonX (2012-07-24 07:25:40)

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compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/librotate.so : No such file or directory
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/lib3d.so : No such file or directory
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/libscaleaddon.so : No such file or directory
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/libcubeaddon.so : No such file or directory
compiz (cubeaddon) - Warn: Failed to load image: fusioncap.png
compiz (cubeaddon) - Warn: Failed to load image: compizcap.png
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/libexpo.so : No such file or directory
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/libezoom.so : No such file or directory
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/libstaticswitcher.so : No such file or directory
compiz (core) - Debug: Could not stat() file /home/photon/.compiz/plugins/libbench.so : No such file or directory

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