ACPI problems with Dell laptops? (was: Jerky keyboard and mouse)

[Pierre-Luc Drouin]

Greg 'groggy' Lehey wrote:

>On Sunday, 20 November 2005 at 23:01:41 -0600, Doug Poland wrote:
>  
>
>>On Sun, November 20, 2005 01:59, Greg 'groggy' Lehey wrote:
>>    
>>
>>>On Saturday, 19 November 2005 at 21:37:03 -0600, Stephen
>>>Montgomery-Smith wrote:
>>>      
>>>
>>>>I recently upgraded from stable-6 of Nov 4 to stable-6 of today on
>>>>my Dell Latitude D800 Laptop, and suddenly the response of the
>>>>touchpad mouse and keyboard was bery bad.
>>>>        
>>>>
>>>Heh.  I saw the subject line and thought "I wonder if this is a Dell
>>>laptop".
>>>      
>>>
>>Well, I'm "glad" I'm not the only one :)
>>
>>    
>>
>>>>In particular, when I type about 1 in 10 key presses simply do not
>>>>register.
>>>>        
>>>>
>>Same here, it's basically unusable if you're a fast touch typist.
>>    
>>
>
>Indeed.  After all, you're quoting yourself :-)  I said:
>
>  
>
>>>This, however, is a order of magnitude worse than what I have
>>>experienced with my Inspiron 6100.
>>>      
>>>
>
>In particular, I didn't get any dropped characters.  And I note that
>I've misquoted the model number; it's an Inspiron 6000, not 6100 (I
>don't think the latter exists).
>
>  
>
>>>What happens when you ping another system?  I found that the ping
>>>time was normal (in the order of 1 µs), but it repeated only every
>>>3 seconds.  When I unloaded ACPI, things worked normally.
>>>      
>>>
>>Not loading ACPI fixed my issues too.  I'd be more than happy to
>>help any testing that may develop.
>>    
>>
>
>I would have been interested to hear the results of the ping.  But
>yes, it would be nice to get the machine to work nicely with ACPI.
>
>Greg
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>  
>
It looks like my problem on my M70. This is caused by recent changes to 
cmbat in -stable. I have tested a patch for it from Hajimu UMEMOTO this 
morning and it seams to be working fine with that patch. Look at the 
thread "Performance problem since updating from 6.0-RELEASE to 
6.0-STABLE last friday" in acpi mailing list