Re: Pentium-M - not recognized?

From: Eric Anderson <anderson_at_centtech.com>
Date: Wed, 23 Mar 2005 18:59:47 -0600
Nate Lawson wrote:
> Eric Anderson wrote:
> 
>> Nate Lawson wrote:
>>
>>> Eric Anderson wrote:
>>>
>>>> Eric Anderson wrote:
>>>>
>>>>> Eric Anderson wrote:
>>>>>
>>>>>> I have a Dell Latitude D610 laptop, and my kernel says:
>>>>>>
>>>>>> CPU claims to support Enhanced Speedstep, but is not recognized.
>>>>>> Please update driver or contact the maintainer.
>>>>>> cpu_vendor = GenuineIntel msr = 6120e2606000e26, bus_clk = 64
>>>>>>
>>>>>> What does that mean to me?  How can I fix it?
>>>>>>
>>>>>> All my various info (full dmesg, acpi dumps, etc) are available here:
>>>>>> http://www.googlebit.com/freebsd/
>>>
>>>
>>> Ok, I've committed a patch to est.c that should add support of acpi 
>>> detection of EST parameters.  Please give it a try.  It probably 
>>> won't work on all systems since it appears some systems need _PDC 
>>> support (something I'm working on).  Actually, if yours doesn't work 
>>> with est, it should work with acpi_perf.
>>>
>>
>> Rebuilt everything, and I'm not certain anything is different.  Latest 
>> output is at the URL above. As a side note - when this laptop goes 
>> from AC to battery, the machine hangs for 10 seconds.  From battery to 
>> AC, there is no hang.  I think it might be some kind of interrupt 
>> storm (USB?).
> 
> 
> No idea, probably the EC timing out.
> 
> I don't understand why acpi_perf doesn't attach on your system.  Have 
> you added a hint to disable it?  Can you boot without cpufreq.ko loaded 
> and see if you get an acpi_perf0?


I haven't changed any of the hints at all.   I booted without cpufreq loaded, and the only thing I really noticed was that the p4tcc stuff disappeared from my dmesg.  I may have missed some other things (it was early, my brain was foggy, etc).  The one thing I did notice (hard not to), is when I unplugged the AC from the laptop, the machine locked up and didn't come back, not even when I plugged AC back in.   

On that note - I did some experimenting, and watching systat -vmstat 1 showed my interrupts jumping from ~1000 on ath0 to over 25000 during the ~10 hang when going from AC->battery mode.  I disabled the minipci slot in the BIOS, and no longer had the interrupt storm (but no wireless too).  I didn't have this issue on 5.3-STABLE for sure, and I *think* I didn't have it on -CURRENT from early Feb.  This might be a new change in Sam's code.


Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
I have seen the future and it is just like the present, only longer.
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Received on Thu Mar 24 2005 - 00:00:13 UTC

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