[Lucid] Processor not at proper freq

[NoOp]

On 05/22/2010 10:02 AM, NoOp wrote:
> Thomas Blasejewicz sent me his lshw file from his HP nx9005 (DR582P)
> laptop. He reported that he did an network upgrade from 9.04 to 9.10 to
> 10.04, but everything in 10.04 is working in slow motion (3 secs for
> mouse click etc). The cpu is an mobile AMD Athlon(tm) XP2200+ 1.8Ghz
> processor, but the lshw shows that it is running at 530Mhz:
> 
> description: CPU
> product: mobile AMD Athlon(tm) XP2200+
> vendor: Advanced Micro Devices [AMD]
> physical id: 4
> bus info: cpu at 0
> version: 6.8.1
> slot: mPGA462B
> size: 530MHz
> capacity: 1795MHz
> width: 32 bits
> clock: 133MHz
> capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 sep
> mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext
> 3dnow up cpufreq
> 
> At first I thought that perhaps the processor was 530Mhz and could be
> upgraded to 1.8Ghz. But checked and the processor is 1.8Ghz but seems to
> be stuck in power save mode.
> 
> I found a related symptom on a posting at linuxquestions.org from 2005:
> <http://www.linuxquestions.org/questions/linux-laptop-and-netbook-25/suse-not-recognizing-all-of-my-processor-328711/>
> 
> Anyone else seen similar & know a relatively simple way to fix?

Just tested on my own HP G60-530US Notebook and found that the issue is
probably cpufreq scaling. Interestingly, lshw shows my cpu running at
low freq when the power cord is plugged in:

$ sudo lshw -c cpu
  *-cpu
       description: CPU
       product: Pentium(R) Dual-Core CPU       T4300  @ 2.10GHz
       vendor: Intel Corp.
       physical id: 1c
       bus info: cpu at 0
       version: Pentium(R) Dual-Core CPU       T4300  @ 2.10GHz
       slot: CPU
       size: 1200MHz
       capacity: 2100MHz
       width: 64 bits
       clock: 800MHz

But this when running on battery:
$ sudo lshw -c cpu
  *-cpu
       description: CPU
       product: Pentium(R) Dual-Core CPU       T4300  @ 2.10GHz
       vendor: Intel Corp.
       physical id: 1c
       bus info: cpu at 0
       version: Pentium(R) Dual-Core CPU       T4300  @ 2.10GHz
       slot: CPU
       size: 2100MHz
       capacity: 2100MHz
       width: 64 bits
       clock: 800MHz

which seems odd. Shouldn't the cpu scale down when on battery & be at
full freq when on a power cord?