Help! I've been all over the frickin web on this one... New Acer M5100-B5302A AMD Phenom 9500 Quad Core cpu Loaded the latest and greatest Ubuntu with the generic kernel -- SMP by default garry@wiggum:~$ uname -a Linux wiggum 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux ....but the system monitor only displays stats for 1 cpu. The system seems to only recognize a of 4 cores. See output of /cat/proc/cpuinfo below garry@wiggum:~$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9500 Quad-Core Processor stepping : 2 cpu MHz : 2194.527 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 : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate bogomips : 4392.39 clflush size : 64 Performance so far indicates that definately there is only a single core at work here. Anyone have any ideas how to fix this?

Just is case could it be that the monitor is set to report cpu's and not cores. I don't suspect that but see just in case. As you say the performance is bad. See if a knoppix disk can report it correctly. Is is 64 or 32 bit? Does the bios support exactly that cpu? I assume you bought it together. Is there any bios select for core. "Best Practices", Event viewer, host file, perfmon, are in my top 10

64 bit eh? I see now that it is indeed a 64 bit chip. I'll install that version and try it.

64 bit install did the trick lesson to all is RTFM

Thanks for the report. I meant Is it 64 not Is is. That is just silly. "Best Practices", Event viewer, host file, perfmon, are in my top 10