I am running Fedora Core 8 w/ all the updates installed. The kernel version is 2.6.24.3-34.fc8 SMP. I have been using the system happily for about 2 months. I don't know just when, but in last week, the kernel sees only 1 of my 2 cores. I know i have run quite some time w/ 2 cores. I am not sure if this is related to some SW update or a bios problem (i loaded "defaults" in bios) or can the CPU actually break and be left w/ just 1 core? I do see a msg at start up, at very start, that says: i8042c: can not read CTR when initializing i8042. Can this be related to my problem? Any hints welcome, I tried lots of google search but did not find anything related. Gautam [root@zadapi-L gthaker]# more /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 107 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ stepping : 1 cpu MHz : 1000.000 cache size : 512 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy misalignsse ts fid vid ttp tm stc 100mhzsteps bogomips : 2010.70 clflush size : 64 THERE SHOULD BE 1 MORE PROCESSOR....!