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openSUSE 11.2 only detect 1 core on AMD Athlon 64 X2 3600

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http://forums.opensuse.org – Here my system information: OS: openSUSE 11.2 x86_64 Kernel:2.6.31.8-0.1-desktop (not recompiled) CPU: AMD Athlon 64 X2 3600+ RAM: 2 Gb (128 share/reserved for video card) Video: nVidia GeForce 8200 (on board) Motherboard: EVGA nForce 730a (nVidia binary drivers) Sound: Intel onborad sound card + ALSA drivers FS: Ext4 on SATA HDD Issue: I was experiencing some issues with some system freezes. In the /sys/var/log/messages, I have noticed some: Code: Jan 22 22:10:39 THOR kernel: [61685.128310] BUG: soft lockup - CPU#0 stuck for 121s! [java:27580] For different dates and and different applications: firefox, checkproc, dsn-resolver, vmware-vmx, amarok, Xorg, gpg, php. The stuck time varies from 62s to 145s I have tried to disable the ACPI at the kernel option at boot (via grub) as suggested on different forum with no-success (now ACPI is re-enabled). I have disabled the splash to check if there is a boot problem (nothing detected). When I was using VMware I was able to choose to use 1 or 2 cores. I can no longer use this option as the system seems to have lost the second core somewhere. When I was using TOP or other CPU/Memory monitor I was able to see the information for the 2 cores. Only 1 core showing in the monitoring tools and in the Yast Hardware information tool. No need to say the system multitasking performances degraded a lot since. Any idea where the other core went? (Distributions)