[Bug 131265] core2 duo speed incorrectly reported in /proc/cpuinfo

Matt Smith matts at bluesguitar.org
Thu Aug 9 09:59:34 UTC 2007

Public bug reported:

Binary package hint: linux-generic

/proc/cpuinfo is incorrectly reporting the speed of core2 duo cpus on
two different ubuntu machines I run (feisty on one, gutsy on the other).
Below is sample output from my gutsy machine. The "cpu MHz" reports
1600.000, it should be 2400.000.

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz
stepping        : 6
cpu MHz         : 1600.000
cache size      : 4096 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips        : 4803.31
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

core2 duo speed incorrectly reported  in /proc/cpuinfo
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