AMD64 and NFORCE3 250GB very slow and USB hungs

[Michael Thonke]

Hello,

I bought just a new AMD64 system with an NForce 3 based mainboard (MSI 
K8N Neo2 Platinum).
When I use the latest kernel from Andrew (2.6.9-rc2-mm3) on boot it 
sometimes hung on boot and the reset state of system is wrong so a have 
to power of the system until usb will work again..at probing the usb 
devices (OHCI,EHCI). Also the system runs really slow and some tasks 
starts and the system hungs. I also tried staircase patches and 
voluntary-preemption but they also wont help.

Any suggestion or hints how to fix that behavior?

Thanks in advance
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