Try recompiling the kernel without IDE support. Use the pata_sis module and /dev/sda instead. You will have to redo grub and initrd.
This got rid of the APIC error on CPU0: 40(40) on a SiS 755 chipset + Athlon64 using 2.6.22-rc6-git2 kernel. The motherboard board is a Foxconn K8S755A-6EKRS.
Try recompiling the kernel without IDE support. Use the pata_sis module and /dev/sda instead. You will have to redo grub and initrd.
This got rid of the APIC error on CPU0: 40(40) on a SiS 755 chipset + Athlon64 using 2.6.22-rc6-git2 kernel. The motherboard board is a Foxconn K8S755A-6EKRS.