My system uses an Athlon 64 X2 4000+ Socket AM2 (Windsor) chip. To boot FC6 w/o Xen it requires the noapic option on the kernel line in grub.conf. When I install the Xen kernel the noapic option moves to the module line. In this configuration the system gives me Panic on CPU 0 IO+APIC timer doesn''t work...boot with noapic option. When I move the noapic option from the module line to the kernel line in grub.conf (for the Xen kernel), the system hangs with ... (XEN) Xen trace buffers: disabled IOAPIC[0]: Invalid reference to IRQ 0 (repeats 4 times) Red Hat nash version 5.1.19 starting and I get nothing more. Does anyone have a suggestion as to how I can boot the Xen kernel? Thanks in advance. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com