RE: 2.6.15-mm2 (acpi-cpufreq not loading)

RE: 2.6.15-mm2 (acpi-cpufreq not loading)

[Pallipadi, Venkatesh]

 

>-----Original Message-----
>From: Brice Goglin [mailto:Brice.Goglin@ens-lyon.org] 
>Sent: Friday, January 20, 2006 5:59 AM
>To: Brown, Len
>Cc: GregR; Pallipadi, Venkatesh; linux-acpi@vger.kernel.org
>Subject: Re: 2.6.15-mm2 (acpi-cpufreq not loading)
>
>Brown, Len wrote:
>
>>Brice, does building =y help?
>>  
>>
>No, it does not. By the way, 2.6.16-rc1-mm2 has the same problem.
>

Brice,

Can you try whether speedstep-centrino driver loads?
You can select both acpi-cpufreq and speedstep-centrino in config and
they will be loaded in proper order at boot time.

Thanks,
Venki

Re: 2.6.15-mm2 (acpi-cpufreq not loading)

[Brice Goglin]

Pallipadi, Venkatesh wrote:

>Can you try whether speedstep-centrino driver loads?
>You can select both acpi-cpufreq and speedstep-centrino in config and
>they will be loaded in proper order at boot time.
>  
>
Yes, speedstep-centrino works. I'll be happy to keep using it since it
seems to provide the same features. But, both are supposed to work here,
right ?
By the way, do you think I should update my BIOS ? My Thinkpad T43 has
been updated two month ago but there's a new update available.

Brice

RE: 2.6.15-mm2 (acpi-cpufreq not loading)

[Pallipadi, Venkatesh]

>-----Original Message-----
>From: Brice Goglin [mailto:Brice.Goglin@ens-lyon.org] 
>Sent: Friday, January 20, 2006 8:24 PM
>To: Pallipadi, Venkatesh
>Cc: Brown, Len; GregR; linux-acpi@vger.kernel.org
>Subject: Re: 2.6.15-mm2 (acpi-cpufreq not loading)
>
>Pallipadi, Venkatesh wrote:
>
>>Can you try whether speedstep-centrino driver loads?
>>You can select both acpi-cpufreq and speedstep-centrino in config and
>>they will be loaded in proper order at boot time.
>>  
>>
>Yes, speedstep-centrino works. I'll be happy to keep using it since it
>seems to provide the same features. But, both are supposed to 
>work here,
>right ?
>By the way, do you think I should update my BIOS ? My Thinkpad T43 has
>been updated two month ago but there's a new update available.
>

Good to know. BIOS is supposed to support either one or both of them,
but as long as one of them works it should be fine. 

Technically, those two should have been a single driver and OS should
use speedstep-centrino mechanism first, if that fails then should fall
back to acpi-cpufreq. But, they are different drivers for historical
reasons.

Probably we can provide a single config option that selects both the
drivers automatically.

Speedstep-centrino is preferrable and better than acpi-cpufreq. It does
a faster frequency transition. So, don't worry about upgrading the BIOS
due to this failure. In general, it is always better to update the BIOS
whenever a upgrade is available though.

Thanks,
Venki

RE: Re: 2.6.15-mm2 (acpi-cpufreq not loading)

[Brown, Len]

>Brice Goglin <Brice.Goglin <at> ens-lyon.org> writes:
>
>> Yes, modprobe's error is not shown in dmesg (I don't know 
>> whether it is configurable or not). I just double-checked my boot, I get :
>
>[SNIP]
>
>> In case if matters, acpi-cpufreq is loaded early (in 
>/etc/modules on my
>> Debian), before any other acpi modules is loaded (except 
>processor since
>> it depends on it).
>
>If it helps, I had the same problem with 2.6.15, and I ended 
>up building it in [*], as opposed to a module [M] at compile time.
>Worked fine after that.

Brice, does building =y help?

thanks,
-Len

Re: 2.6.15-mm2 (acpi-cpufreq not loading)

[Brice Goglin]

Brown, Len wrote:

>Brice, does building =y help?
>  
>
No, it does not. By the way, 2.6.16-rc1-mm2 has the same problem.

Brice

RE: 2.6.15-mm2 (acpi-cpufreq not loading)

[Brown, Len]

Brice,

>>Can you test the _PDC patch here all by itself?
>>
>>http://bugzilla.kernel.org/show_bug.cgi?id=5483#c17
>>
>>  
>>
>Yes, 2.6.15 +
>http://bugzilla.kernel.org/attachment.cgi?id=6731&action=view is also
>broken.
>
>>If this patch is what causes the failure, please 
>>build with CONFIG_ACP_DEBUG=y and attach the dmesg
>>from the failure, as well as the output from acpidump,

The dmesg you attached doesn't show a message showing
that acpi-cpufreq failed to load.

-Len

Re: 2.6.15-mm2 (acpi-cpufreq not loading)

[Brice Goglin]

Brown, Len wrote:

>The dmesg you attached doesn't show a message showing
>that acpi-cpufreq failed to load.
>  
>
Yes, modprobe's error is not shown in dmesg (I don't know whether it is
configurable or not). I just double-checked my boot, I get :

ACPI: Processor [CPU] (supports 8 throttling states)
FATAL: Error loading acpi_cpufreq (/lib/modules/.../acpi_cpufreq.ko): No
such device
Machine check exception polling timer started.

instead of (2.6.15):

ACPI: Processor [CPU] (supports 8 throttling states)
acpi-cpufreq: CPU0 - ACPI performance management activated.
Machine check exception polling timer started.

In case if matters, acpi-cpufreq is loaded early (in /etc/modules on my
Debian), before any other acpi modules is loaded (except processor since
it depends on it).

Brice

Re: 2.6.15-mm2 (acpi-cpufreq not loading)

[GregR]

Brice Goglin <Brice.Goglin <at> ens-lyon.org> writes:

> Yes, modprobe's error is not shown in dmesg (I don't know whether it is
> configurable or not). I just double-checked my boot, I get :

[SNIP]

> In case if matters, acpi-cpufreq is loaded early (in /etc/modules on my
> Debian), before any other acpi modules is loaded (except processor since
> it depends on it).

If it helps, I had the same problem with 2.6.15, and I ended up building it in
[*], as opposed to a module [M] at compile time.  Worked fine after that.

g