System Hangs

[peppi911]

My last problem with 10.5.6.

System stands still from time to time. Only mousemovements are possible then.
After 15 seconds or so it goes on as normal.
If I look in Log the last entry always is:

26.12.08 20:47:47 System Profiler[710] sysctl machdep.cpu.core_count errno = 2, trying machdep.cpu.cores_per_package

Anybody knows what that might be? Running voodoo v1 on AMD.

P