Thank you for the fast response. > > The machine is an IBM X3550 with Dual Core Xeon 5050. > > 32 or 64bit kernel?
64bit kernel, xen version and vanilla kernel. > > The kernel options are noapic and acpi=off. I hope, somebody have > > ideas... > > So you forcefully disable things which are needed on modern machines. I know... Without any additional option it was the same behaviour. In the past, APIC and ACPI sometimes made trouble. Heiko -- Dr. Heiko Schulz Fachbereich Mathematik Systemadministration Pfaffenwaldring 57 Raum 8.313 Universität Stuttgart Tel. : (0711) 685 65344 Fax : (0711) 685 65348 E-Mail : [EMAIL PROTECTED]