Hi, I have installed FC1 and have been very impressed. It boots in uni-processor mode happily. My DELL Inspiron 5150 has a 3Ghz Pentium which according to the BIOS is HT capable. FC1 installed a SMP kernel, but booting SMP via grub results in: ... CPU: Physical Processor ID: 0 Intel machine check reporting enabled on CPU0. CPU0: Intel Genuine Intel(R) CPU 3.06Ghz stepping 09 ... Booting processor 1/1 eip 3000 Not responding Error: only one processor enabled. cat /proc/cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Genuine Intel(R) CPU 3.06GHz stepping : 9 cpu MHz : 3056.555 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid bogomips : 6094.84 HT is enabled by the BIOS. I have had HT working on other Dell based machines (though not a laptop) with RHL8, any ideas? Thanks, Peter.