Athlon 64 UP CPU -- no frequency scaling support?
Aioanei Rares
schaiba at gmail.com
Thu Oct 29 20:01:38 UTC 2009
Dave Jones wrote:
> On Thu, Oct 29, 2009 at 05:38:00PM +0200, Aioanei Rares wrote:
> > The cpufreq-* modules are loaded, I tried both available Fedora kernels
> > (2.6.31.5-96.fc12.x86_64 and
> > 2.6.31.1-56.fc12.x86_64, acpitool --cpu says :
> >
> > CPU type : AMD Athlon(tm) 64 Processor 3800+
> > CPU speed : 2400.392 MHz
> > Cache size : 512 KB
> > Bogomips : 4800.78
> > Processor ID : 0
> > Bus mastering control : yes
> > Power management : no
> > Throttling control : no
> > Limit interface : no
> > Active C-state : C0
> > C-states (incl. C0) : 0
> >
> > But...in works in $OTHER_DISTRO and /proc/cpuinfo says
> >
> > processor : 0
> > vendor_id : AuthenticAMD
> > cpu family : 15
> > model : 95
> > model name : AMD Athlon(tm) 64 Processor 3800+
> > stepping : 2
> > cpu MHz : 2400.392
> > cache size : 512 KB
> > 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 syscall nx mmxext fxsr_opt rdtscp lm
> > 3dnowext 3dnow up rep_good extd_apicid pni cx16 lahf_lm svm extapic
> > cr8_legacy
> > bogomips : 4800.78
> > TLB size : 1024 4K pages
> > clflush size : 64
> > cache_alignment : 64
> > address sizes : 40 bits physical, 48 bits virtual
> > power management: ts fid vid ttp tm stc
> >
> >
> > ...so it obviously should support cpu frequency scaling. Any ideas?
>
> What does cat /sys/devices/system/cpu/cpu0/cpufreq/* say ?
>
> Dave
>
>
The folder cpufreq is nonexistant and /var/log/messages tells me there's
a firmware bug so no frequency scaling available.
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