Hi, I've changend in the /etc/xen/xend-config.sxp dom0-cpus from 0 to 1. The server worked two weeks or more. Then I installed the update [SECURITY] [DSA 1800-1]. Actually the server ist up 3 days. Today I saw the update [SECURITY] [DSA 1809-1]. When I finde time, I will install this update. S. Pfeffer