Mobile Celeron with Speedstep ? - speedstep-centrino freezes machine

Mobile Celeron with Speedstep ? - speedstep-centrino freezes machine

[Thomas Renninger]

Hi,

I also have a Mobile Celeron (IBM R40e) problem here:

I thought Celeron CPUs are not speedstep capable, seems as if I was 
wrong (ss flag indicates speedstep, right?)...

On this machine speedstep-centrino freezes machine (shouldn't it already 
go out at the model name check, or has this been changed?):

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Mobile Intel(R) Celeron(R) CPU 2.40GHz
stepping        : 9
cpu MHz         : 2392.030
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca 
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips        : 4751.36

I am just compiling kernel -> centrino debug enabled. Hints and 
suggestions very welcome.

     Thomas

P.S.: uname -r
2.6.8-7-default -> SUSE kernel (no modifications concerning speedstep)

Re: Mobile Celeron with Speedstep ? - speedstep-centrino freezes machine

[Dominik Brodowski]

On Mon, Sep 20, 2004 at 03:41:05PM +0200, Thomas Renninger wrote:
> I thought Celeron CPUs are not speedstep capable, seems as if I was 
> wrong (ss flag indicates speedstep, right?)...

no, ss flag indicates something else, enhanced speedstep is indicated by
"est".

> On this machine speedstep-centrino freezes machine (shouldn't it already 
> go out at the model name check, or has this been changed?):

It should reaturn -ENODEV in centrino_init().

        if (!cpu_has(cpu, X86_FEATURE_EST))
                return -ENODEV;


	Dominik

Re: Mobile Celeron with Speedstep ? - speedstep-centrino freezes machine

[Thomas Renninger]

Dominik Brodowski wrote:
> On Mon, Sep 20, 2004 at 03:41:05PM +0200, Thomas Renninger wrote:
> 
>>I thought Celeron CPUs are not speedstep capable, seems as if I was 
>>wrong (ss flag indicates speedstep, right?)...
> 
> 
> no, ss flag indicates something else, enhanced speedstep is indicated by
> "est".
> 
> 
>>On this machine speedstep-centrino freezes machine (shouldn't it already 
>>go out at the model name check, or has this been changed?):
> 
> 
> It should reaturn -ENODEV in centrino_init().
> 
>         if (!cpu_has(cpu, X86_FEATURE_EST))
>                 return -ENODEV;
> 

Freezes before or inside this function.

This machine seems totally broken:

modprobe cpufreq_acpi_pdump
FATAL: Error inserting cpufreq_acpi_pdump 
(/lib/modules/2.6.8-7-default/kernel/drivers/acpi/cpufreq-acpi_pdump.ko): 
Input/output error
ibm9:/usr/src/linux/arch/i386/kernel/cpu/cpufreq #

-> Freeze.
Anyone an idea what exactly could cause the freeze, or how to analyse it?

If someone is interested, email me and you can have remote access on the 
machine.

The guys who own this machine have about ten of those (IBM R40e - Mobile 
Celeron). Tested on three machines and it was the same problem on each.


     Thomas

Re: Mobile Celeron with Speedstep ? - speedstep-centrino freezes machine

[Dominik Brodowski]

On Tue, Sep 21, 2004 at 05:55:21PM +0200, Thomas Renninger wrote:
> modprobe cpufreq_acpi_pdump
> FATAL: Error inserting cpufreq_acpi_pdump 
> (/lib/modules/2.6.8-7-default/kernel/drivers/acpi/cpufreq-acpi_pdump.ko): 
> Input/output error
> ibm9:/usr/src/linux/arch/i386/kernel/cpu/cpufreq #
> 
> -> Freeze.
> Anyone an idea what exactly could cause the freeze, or how to analyse it?

Do I understand it correctly that the system freezes _after_ modprobing
cpufreq_acpi_pdump fails??? The -EIO result itself isn't strange, it means
the call to acpi_processor_register_performance() failed which happens on
several systems.

	Dominik

Re: Mobile Celeron with Speedstep ? - speedstep-centrino freezes machine

[Stefan Seyfried]

On Mon, Sep 20, 2004 at 03:41:05PM +0200, Thomas Renninger wrote:
> Hi,
> 
> I also have a Mobile Celeron (IBM R40e) problem here:
> 
> I thought Celeron CPUs are not speedstep capable, seems as if I was 
> wrong (ss flag indicates speedstep, right?)...
> 
> On this machine speedstep-centrino freezes machine (shouldn't it already 
> go out at the model name check, or has this been changed?):

this is a P4 celeron, isn't it?
 
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 15
> model           : 2

15 2 is a Pentium 4 Northwood if i read the code correctly

> model name      : Mobile Intel(R) Celeron(R) CPU 2.40GHz


> flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca 
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid

the ht flag also indicates a p4.

> I am just compiling kernel -> centrino debug enabled. Hints and 
> suggestions very welcome.

P4 is not centrino, it is crap :-)
-- 
Stefan Seyfried