ethernet no ping, apic, acpi
With nforce2 and VIA mboards I've seen the problem of ethernet driver loading OK but no ping. Both times this was hackable by turning mboard apic off, but the real fix was flashing with the latest bios, acpi on in linux kernel works fine.
Somebody upgraded their binary kernel package without installing a source or header package for that new kernel, and had an nforce2 ethernet module problem, fixed by installing a source or header package for the kernel number they upgraded to.
I'm sick of hearing tips "acpi=off" and "pci=noacpi" when acpi is great stuff and the need is to upgrade bios firmware and just possibly still use cmos apic off so linux can turn apic on, but in any case linux acpi and apic works.