Re: ichss0: transition to 1 failed

> Date: Thu, 9 Jun 2005 02:07:29 +0200
> From: Marcin Jessa <[email protected]>
> Sender: [email protected]
> 
> After I recompiled my kernel with device cpufreq , dmesg spits out tons of messages like:
> ichss0: transition to 1 failed
> What does that mean?
> 
> sysctl -a |grep ich shows:
> dev.ichss.0.%desc: SpeedStep ICH
> dev.ichss.0.%driver: ichss
> dev.ichss.0.%parent: cpu0
> dev.ichss.0.freq_settings: 1397/-1 -1/-1
> 
> sysctl dev.cpu|grep freq shows
> dev.cpu.0.freq: 1397
> dev.cpu.0.freq_levels: 1397/-1 1222/-1 1047/-1 873/-1 698/-1 523/-1 349/-1 174/-1
> 
> I dont use est.
> 
> My CPU: (Thinkpad R50e):
> CPU: Intel(R) Celeron(R) M processor         1400MHz (1395.48-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0x695  Stepping = 5
>   Features=0xa7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE>

OK. This one looks really weird to me.
dev.ichss.0.freq_settings: 1397/-1 -1/-1
This says that you have two CPU speeds, 1.397 GHz and -1. ????

Worse, this system is a Celeron-M. I am not terribly familiar with the
Celerons, but I thought the Celeron-M supported EST, not ICHSS. Why do
you not use est? It's much more powerful than any other power management
technology.

Can you post a full DMESG? I'm curious what the device probe is picking
up. Something looks bogus. I'm just not sure what.

Is someone else running a Celeron-M system on current? What do you see
for 'sysctl dev.ichss' and 'sysctl dev.cpu.0'? I have a hunch that the
system is not probing correctly and really does not do ICHSS.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: [email protected]			Phone: +1 510 486-8634
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