Hi, I've moved my hard drive to a new Core 2 Duo system and it freezes (Panics) 2 - 5 minutes after booting. I get about a page of debugging info, but the two lines that are understandable to me are BUG: spinlock recursion on CPU#1, swapper/0 (not tainted) BUG: warning at arch/i386/kernel/smp.c:540/smp_call_function() (not tainted) My system is a Core 2 Duo E6600 2.4Ghz Asus P5W DH Deluxe 1GB Ram (Corsair PC-8000) 73GB WD Raptor The system runs fine with the non-smp kernel I'm trying to run vmlinuz-2.6.17-1.2187_FC5smp Any ideas where to look first? Thanks Todd