Hello, 2.4.23 complains abount an unexpected IO-APIC (see that attached dmesg-output). The board is an Tyan Thunder K8S (S2880) with only one opteron cpu. Before I just upgraded the bios to current version those messages didn't occur. Please cc me since I'm not suscribed to this list. Cheers, Bernd -- Bernd Schubert Physikalisch Chemisches Institut / Theoretische Chemie Universität Heidelberg INF 229 69120 Heidelberg e-mail: bernd.schubert@pci.uni-heidelberg.de