Dear Readers Got a strange Problem when I try to start an application. My System: Distro: Fedora Core 5 Kernel: 2.6.17-1.2187_FC5xen0 CPU: Inter Xeon 3.20 GHz RAM: 2.5GB Guest and Dom0 are Fedora Core 5 with 2.6.17-1.2187 Kernels. My Error MSG: BUG: soft lockup detected on CPU#0! <c043a582> softlockup_tick+0x9f/0xb4 <c0408760> timer_interrupt+0x4fc/0x544 <c0404d79> hypervisor_callback+0x3d/0x48 <c043a63d> handle_IRQ_event+0x42/0x85 <c043a70d> __do_IRQ+0x8d/0xdc <c040665a> do_IRQ+0x1a/0x25 <c051a159> evtchn_do_upcall+0x66/0x9f <c0404d79> hypervisor_callback+0x3d/0x48 <c05ae0f8> general_protection+0x0/0xc <c0404dfe> failsafe_callback+0xe/0x40 <c0410e27> write_ldt_entry+0xd4/0xdb <c0408d43> write_ldt+0x18d/0x1af <c0404ba7> syscall_call+0x7/0xb After this message, you can see in XenTop that my guest is using 100% of the cpu. After a while, the dom0 is rebooting from itself. But between the crash of the guest and the restart of the dom0, I can work in the dom0. I really can''t understand this. Thanks a lot for any help or link... bye Philipp ==============================================Philipp Jäggi SNCT Sandweiler bp 23 L-5230 Sandweiler +352 35''72''14''342 mailto: philipp.jaeggi@snct.lu